Larry - Well, I discovered the reason for the problems I was having with .opf files and it might be something that others on the list could profit from. I was downloading and unpacking the DAISY-format books from Bookshare using my PAC Mate, then transferring the .opf files to my PC and then on to the BP. The transfer from my PAC Mate to PC was done using ActiveSync and apparently, even with file conversion turned completely off in ActiveSync, .opf files get corrupted when they go this route. The same book's .opf file worked fine when downloaded and unpacked directly on the PC, but failed 100% of the time when ActiveSync was introduced into the picture. The moral, if any: don't transfer .opf files using ActiveSync or they'll be corrupted and won't transfer using the BP transfer software. -- Walt Smith - Clearwater, FL walt@xxxxxxxxxx