First of all use the search button before stating a new thread.
All you have to do is make sure you delete all the mods in your call of duty folder. Check in Main and uo and delete anything that you know doesn't belong. Should be about everything but dlls, localization, paks, and some config files.
yes but dont delete the ones you keep.. try making a folder for the ones you like.. move them when u want to watch... then put them back when ur through..