You can always use Batch Thumbs to convert the named files to P1... files in the matter of a few seconds. I do that even to the numbered files just to mix the photos up among my different leagues.
usba.ootp-leagues.com/LivnLegend's%20Photo%20Pack.zip
Sorry but it won't let me create a link to the download. Copy the above address with
www. added to the front of it and paste it in the address bar to get the file.