What (if any) are you seeing when the game crashes?
Drag and drop your new gameconfig.xml into the OpenIV window, replacing the old one. Close OpenIV and launch your game. Troubleshooting Common Issues gameconfig -1.0.2245- for limitless vehicles v25.5
from the v25.5 download folder into this location, replacing the existing file. What (if any) are you seeing when the game crashes
Launch the game. Open the console ( ~ key). If you see no errors, open the Map and spawn a rare vehicle via a trainer (like Simple Trainer or Enhanced Native Trainer). If it spawns, you are golden. you are golden.
