The 430 is all about finesse and feel. the car is VERY predictable, the back end will come out if you mash it around a corner, so don't mash it be gentile in your throttle application in 2nd/3rd gear corners, (i dont use second in the f430 unless in a hairpin i find that there is enough torque in 3rd to get me into the revs quickly and it allows me to be more generous in my throttle application around the tighter bends {tuned for 700pp btw})
The GREAT thing about the f430 is the fact that it is so damn obediant right out of the box, it will do what you ask it to do, so if you rip on the wheel well, it rips into the corner which will result in the tail end coming out, same with throttle, if you ask it to go by stepping your foot through the firewall it will respond by spinning the arse end around. the key with the f430 is to ask it to do things that are possible within the realm of physics.
So like a skillfull commander you must ask your troops to fight hard but not fight a loosing battle.
I'll leave you with this, if you give it a little respect it is a VERY satisfying car to drive.
P.S. there are MUCH harder cars to handle, the f430 is by far the most tame mid/rear car Ive been in in gt5p i even find the 4wd R8 harder to handle.