First browse to your GTA:SA isntall directory, it will look something like this: C:Program FilesRockstar GamesGTA San AndreasThen go to the data directory. MAKE A BACKUP OF ANY FILES BEFORE YOU EDIT THEM. To edit the vehicle stats, open the handling.cfg file in notepad. As you can see, all the info on every vehicle in in there. Follow the instructions in the comments to find out how to edit it.You can do anyuthing like make a Rhino as light as a PCJ600 and control just as well.Basically, you can edit anything in the game from these files. Just be careful what you edit and leave them as sane values to prevent glitches.