I loaded up Korana's Instruments mod in the construction set and when I try to place the cello in the gameworld, I get the following error:

TES3Stream Warning: Model "Meshes\2a\KO_chello_wooden.NIF" tex not found "REFMAP.GIF"!

There are only 21 textures in the folder: http://img820.imageshack.us/img820/5104/53042758.jpg

I went into NifSkope and found where it is at. http://img295.imageshack.us/img295/3716/nifskope.jpg
So, do I need that file? The cello looks perfectly fine in game. Does anyone have this refmap.gif? I've never even seen a .gif file in the Textures folder before.

Looks like a placeholder name rather than a real texture; no-one uses GIFs for textures. Guessing it's a reflection map, try replacing it with KO_envo.bmp instead.

Thanks, Hrnchamd. That worked. I'm not sure what it was looking for any ways but at least the error message is gone and the cello looks fine in game any ways.