I'll second what Scaff said on the format stuff. Punctuation marks are your friends.

Especially if used correctly.
As for a general answer on tuning:
With a lightweight fWD car, you don't want to get to crazy with HP.
You'll get major wheelspin, and major understeer for your efforts.
If you'll use the "Search" feature, and look up "Tranny Trick" you should find many entries on the GT3 forum on using it.
It works fairly well for most cars in GT4 also.
Depending on your driving style, You'll likely want some negative camber on your rear wheels, and your rear end a little higher than the front to achieve better "turn-in".