NFSUnlimited.net

Just asking because I can't find any.

It's kindof hard to have a decent walkthrough for a racing game. I mean, it'll mostly be Finish this race here, this race there, unlock this part, etc. Not really much different than playing through the game on your own.

Money is limited, so it's better to use the pink slip cars until you get to tier 1 (no tier 1 pink slip cars).
Recommended pink slip cars:

Tier 4 - Elise
Tier 3 1st time - Audi TT
Tier 3 2nd time - Dodge Challenger or Mazda RX7
Tier 2 1st time - Gallardo or Porsche GT2
Tier 2 2nd time - BMW M6 only choice - not the 8 speed version from job, slower than Gallardo or GT2.

Tier 1 that you buy - Zonda, Z06, or F1.

Note that you can continue using the Elise until you get the tier 2 pink slip car. This saves a bit of money as parts for the Elise are cheaper than parts for the tier 3 cars.

Do the jobs soon after they are available, as it's the jobs that causes career mode to progress, unlocking pink slip cars and peformance parts. The pursuit events don't pay any money, but do raise your wheelman level, you might want to save some of them for later.

A list of all 187 events:

http://jeffareid.net/nfsuc/nucevent.txt

The pink slip cars:

http://jeffareid.net/nfsuc/nucps.txt

Thanks for the advice and I need to do the game again.