You should head on to the nearest car saloon, even if you've managed to win Ming's Lamborghini. It would be best to compare performance bars of all of the unlocked cars.
Dodge Viper (#1) certainly looks nice and has some great sound engine. Sadly, you shouldn't be interested in it. I can assure you that the Gallardo or even one of the "older" cars is a better proposition. Viper is an extremely fast car, especially when you've bought all of the performance upgrades, HOWEVER it handles horribly. Take a look at the performance bars to notice a HUGE difference. Viper is cheaper than the Gallardo, however you should already own a Lamborghini. Furthermore, you would have to spend a lot of money to buy all of the performance upgrades for the Viper.
Lamborghini Gallardo (#2) doesn't only look great, but it also is very agile. The car drives like a dream. You won't have ANY problems with the sharper turns, even while moving at higher speeds. Gallardo will be replaced by Murcielago in the near future, however at this point of the Career mode you shouldn't worry about that. Gallardo is a little slower than some of the other cars from the pack, however you will be able to extend the lead while getting through corners, so you won't have to worry about that.
Be sure to spend the rest of the money on performance upgrades. You should be interested in the improved Nitro. This item have appeared in all of the local car shops.
In order to take down Webster you will have to deal with his requirements first. Here they are:
1) Races won: 7
2) Milestones completed: 4
3) Total number of points: 3050000+.
1. Lap Knockout - Dunwich Village
You will have to deal with several challenging turns after the start. This will also include a series of very fast corners, however you won't have to worry about them too much. Remember to use your brakes before the tight left turn (#1). You should also maintain a decent speed while doing that. Don't forget to use shortcuts along the way (#2). You probably remember most of them. The final part of the race is definitely less challenging. Don't go under the tunnel, because you'd have to slow down a lot.
2. Circuit - Ironhorse
You will encounter some challenging corners near the start line (#1). If you're lucky, you should be able to cut through most of them, however I'd like to say that there will be a lot more of them in the future. A very difficult turn has been located near the ending part of a long stretch (#2). Use your brakes aggressively in order to get through it safely. You have to be very careful near the end of the last lap. There are two challenging corners here. You can't make any mistakes, otherwise you would have lost the whole race.
3. Sprint - Lyons & State
The first part of this challenge isn't too hard, however you will have to slow down in a few places. You shouldn't have any problems with that. You will reach a forest path very soon (#1). Pick your shortcuts carefully. You also have to watch out for bigger trees, because they will stop your car. You can't destroy them in any way. After you leave the park use the nearest shortcut in order to extend your lead even more. You will be surprised with a lot of challenging corners (#2). Remember to use the brakes wisely. You will also have an opportunity to cut through most of them.
4. Tollbooth - Stadium & Beacon
This is a very easy challenge. You will be encountering some junctions along the way, although in most cases both routes will be equally interesting. You should concentrate most of your efforts on avoiding barriers and buildings. Hitting these objects will slow you down considerably. You will probably notice a small shortcut along the way (#1), however you may ignore it. I'd recommend using the factory shortcut located near the finish line (#2). You will probably gain at least a couple of seconds by choosing this path. Watch out for the police forces!
5. Sprint - Camden & Fisher
Use the well known shortcut that's been located near the start line (#1). Remember to avoid barriers and other larger objects. You will have to deal with several fast corners. Be sure to stay on the main road, so you won't hit anything along the way. There's a clever shortcut located in the industrial zone. Once you're on a very long stretch (#2) activate the nitro to regain your usual speed. The final part of this challenge is rather easy. Just as before, you will have to avoid police units.
6. Tollbooth - Bay Bridge & Forest
You probably won't have ANY problems with this challenge. After you reach the first junction pick the path located on your right. Watch out for a rather challenging left turn, located near one of the checkpoint gates (#1). You will probably have to use the brakes quite aggressively, because you'll be driving at a very high speed. Be careful, because there are more of these corners nearby. Remember to use all known shortcuts. One of them will require you to break through a huge billboard (#2).
7. Tollbooth - Skyview & Coast
Pick the left lane after the start. Thanks to that, you should be able to save up at least a couple of seconds. The next junctions aren't that important. You have to watch out for some fast corners, though (#1). Most of them have been located near straight lines, so you've got to use your brakes wisely. There's a sharp right turn near the end (#2). You have to be very careful here.
1. Bounty (90000 points)
This is one of the most difficult challenges of the game, however you should try to complete it. You will have to score at least 200000 Bounty points during a single pursuit. It will probably take you at least 10 minutes. I'd personally recommend getting involved in a lot of crashes with police vehicles. You might also try breaking through roadblocks.
2. Cost to State Challenge (90000 points)
This, on the other hand, is a very simple challenge. You will have to make damages worth at least 100000 dollars. It shouldn't be that hard, especially since you're trying to complete other objectives as well.
3. Pursuit Evasion (90000 points)
This is an easy challenge, however you should stay on the lowest level of a pursuit in order to complete it. I'd personally recommend picking this challenge from the main menu. Thanks to that, you won't have to worry about any additional units.
4. Spike Strip Challenge (90000 points)
I don't have to remind you (AGAIN ;-)) that you've got to be extra careful (#1). Like I've said before, try staying on freeways. Thanks to that, you will have a chance to escape or evade police units successfully. It would also be wise to activate the Speedbreaker feature once you notice a spike strip. Thanks to that, you will be able to plan your next actions carefully.
I've got some bad news for you. For the first time ever you will have to take part in THREE events. Furthermore, this won't change in the next stages of the Career mode. As for these races, I'd recommend choosing a very fast vehicle, although it should also handle decently.
1. Sprint - Beach & Chancellor
There are some fast corners near the start line. You will be able to use an interesting shortcut along the way (#1). Don't miss it, because your opponent would have taken the lead. This is the only way to stay in front of him. You will be encountering other shortcuts very soon. Choose the small path located beneath the lighthouse (#2).
You will have to watch out for some challenging turns located near the finish line (#1). You should probably remember them from the previous races. Don't forget about the nitro! You might also consider activating the Speedbreaker.
2. Speedtrap - State & Petersburg
This is by far the most challenging race of the current Main Event. The speed cameras have been located in very difficult spots. You will have to remember that, especially while taking some of the sharper corners. One of the first speed cameras have been located in a middle of slow turns (#1). You will have to pick a good route. Don't forget about the possibility of using nitro! The other speed cameras are located in similar spots (#2). You will have to be very careful and precise. The only exception is the last camera. It's been located in a very long tunel. Good luck!
3. Sprint - State & Warrent
First of all, you will have to go through several fast corners. More challenging turns will begin to appear shortly (#1). Use your brakes wisely in order to pass through them safely. You will also have an opportunity to cut through most of them. The following corners should be well known to you by now. The only exception is the challenging left turn (#2), leading to one of the freeways.
I guess I don't have to remind you that maximum possible speed should be kept at all times. Furthermore, you must be using nitro. You will reach the forest path within a couple of seconds (#1). Be careful, because you probably don't know it too well. Thankfully, the final part of the challenge is less complicating. You will be driving mostly on straight lines with a few mild corners.
Webster was driving a Chevy Corvette with all of the performance upgrades installed. You might want to fight for it, although you'll probably sell it afterwards.