Well (okay, it might not make i dif for my laptop, I dont know) it would at least save my time from always copying all the files into the object window in the CS. Or do I make any silly mistake and this is not even needed to? If I want to use dif meshes than the vanilla, I do have to put them into the CS for every mod I want to work with them again, dont I? (If not, just tell me ;)) And that time I would like to save by making kind of master BSA or anything where all the nifs, I usually use or could use, is in and I can access to. (See, if you only take Strotis, Momos and MEOs nice meshes I like to use, there are so many that it indeed takes time to copy them in again again and again and again.) And to the point of extending the original BSAs, we can go over that, because I'm not into more than building nice things up in the CS, I dont have that much knowledge about the software more than that. THATs why I was asking if that would be possible. I understand that I shouldnt do. Still my other questin is if it is possible to make such a msterfile. Okay? (Oh and I apologize in case I just dont get your point, I'm historian and not into informatics, I'm glad I even know what BSA, nif, mesh etc. is, so please dont expect me to have THE knowledge of everything about modding and CS.)