Just ta help you a bit, here's a quick way to correct the .BUM problem...I don't own the Eagle Expansion, but it's worked on other MAT files flawlessly: 1. Open your MAT .pz2 file in WordPad (NOT Notepad) 2. Use the Replace feature from the Edit menu. Do a 'Replace all' of .BUM with .JPG 3. Save the file (new name or not, your choice) This will now have the MAT files reference the .JPG file directly, rather than the .BUM file. Saved me a lot of headaches, and really only took seconds on any file I ran into the problem with. Sorry you're having troubles, I hope this helps a little...