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There're freeware programs that work like file manager used to in Win 3x, that is they don't give you a thumbnail, just a list of filenames in a directory, plus the file extensions if you want them, of course. If all of your bps are in the one folder and the names are representative, it's an easy cut'n'paste to wordpad, put a comma, or space or some other delineator between the names, save as text, then change the file extension of the wordpad file to .csv, you can then import the .csv into excel.
I got PhotoImpact 6 as a freebie from a mag CD which came with PhotoImpact Album. I'm an impatient bloke and I haven't been able to come to grips with picture manager apps before, but this PI album is a beauty, easy to work with and navigate. Whenever I rustle up a new bp, I just slip it into the album which holds links to all of my bps, with thumbnails. Nice and simple for a KISS-oriented fella like me.