ok, try this...
first, most WINRAR mods are in a zipped folder and in that folder another folder that contains the mod. now you have to take the mod out of the folder and put in your override for it to work, so I would look and see if you have a bunch of files in your override that are labeled the same as your mods...
next, for the self-installing mod, try just selecting the Kot0R I folder when you use it...
If this dose not work just post again, and I will type yup my next idea of what might be wrong...
DN