Pizzadvl, have you played MoT on your computer before?
If no - try to play MoT missions without MoTmod.
If yes - I can suggest to reinstall the MoTmod. Follow
these instructions step by step.
To uninstall MoTmod just delete all folders (Levels, Models, Players, Scripts, Shaders, Sounds, Textures, UI) from your MoT game folder and restore 8 vfs files (levels.vfs, models.vfs, players.vfs, scripts.vfs, shaders.vfs, sounds.vfs, textures.vfs, ui.vfs).