do not touch global.cfg file!

you can delete:

- all language files, leave only one that you wan't to use (English for eg.)
- all voice files, leave only one that you wan't to use (English for eg.)
- .dem file
- all buildings
- all maps, leave only one map (xxx.fbl) that you wan't to use. Also delete basemap and all additional files if present - fda, fpa, fsp, hnr..
- all poi's, leave ony one (or none if you don't really need it for testing purposes)
- all speedcam files
- all skins
- all 3d cars
- entire TMC folder