so last night i tried editing "nismo's edit for reese" adding a spoiler to it, it came out messed up, the tail lights were gone, the wheels lost their textures, my guess is it has something to do with vehicle.txd or infernus.txd
why would u delete sa-mp.cfg? useless solution.
Try to go to Documents > GTA San Andreas User Files and delete gta_sa.set. this will reset your gta sa settings to default ones, as if u freshly downloaded and installed the game without any previous options.
Solution 1: Go to Documents --> GTA San Andreas User Files --> SAMP. In SA:MP folder, try to find sa-mp.cfg and delete it.
Solution 2: Do you have maybe 2 GTA San Andreas folders? If you have, maybe SA:MP is in wrong one.
Solution 3: Try to change compatibility mode of GTA:SA or run it as administrator.