Please help my cars that i install with the sparkIV are rolling on the side when i Turns on left and right please help !!!!

You need to cahnge the handling.dat its nothing to do with spark IV

with what new one ?

what car are you using?

wait a second i get ya  handling.dat thats the code yea ? so i have 1 more prog that called GTA IV Vehicle Mod Installer its install all the handling and the car but then
after like 5 minutes playing its just exit the game and thats it

and thats the car 
http://www.gta4-mods.com/vehicles/hummer-h2-2010-limited-edition-f17232

Yes it is.I think waht u mean is that its crashing :S

yeah its crahing but dosent say anything just crush !

Its maybe because your using too many mods.