To make a picture, use RSRConvert, available in free stuff. However, I personally found that the instructions were wrong.. I did NOT have to invert the alpha channel. Essentially, the steps are this: 1) Make a 600 x 600 render of the object in question. 2) Save as Mac PICT 3) Open in Photoshop (or whatever) 4) Resize to 91 x 91 5) Save as Mac PICT 6) Open RSRConvert 7) Choose the source file AS WELL as the target .rsr location in the little dialog. 8) Click convert (or whatever) Poof. RSR File. As for the valid file format.. Make sure that it was saved as plain text, pure ASCII. I didn't get that error, so I am only guessing as to what the problem is.