does the BMP skins, loads in Multiview?
If they doesn't, you have a problem with you DT installation (i.e wrong descriptors in Devs:Datatypes/ and/or double DT installed as i.e bmp.datatype and WarpBMP.datatype)
Theres an exception for some BMP skins.
For some reason, they are in a BMP format not supported by our DT. Its enough to load in a GFX program and save again in BMP.