@michael77 - Frecklychimp is spot on - there's a lot more to the set up than just the elements you've asked about but in answer to your points, here goes:-
Caster Angle - Best described as the angle of the king pins relative to the vertical plane. Think of it like trail on the forks of a bike. More Trail (caster) resists direction change. What this means is that more caster will make the car feel lazier on turn in but conversely, it will also want to stay in the turn longer - so it can 'hook' on corner exit.
Kick Angle - best explained by the main man himself Dyno-Dan. Click
here for an awesome explanation.
Rear Hex Width - Affects the way that the car drives forward. More width can help in slippy conditions by giving the car more forward drive.
My favorite front end combination is 25 deg kick with 5 deg blocks. Rear Hex width I haven't played much with but you won't go far wrong with +0.75mm hexes in your box if you fancy it.
Hope this helps - but as Frecklychimp has said - your car is going to be predominantly characterized by many other factors including springs, pistons, oils and roll centres. Post your set up here and we'll try to help, else have a look on tlracing.com and try to see what the TLR team guys are up to - but beware cos most of them have got their motor still in a funny place
