Hi, Bob. These are files created in finale that are exported in .ai format. I get no choices or options except whether or not to embed fonts. They were created on a mac going to a mac, but since that version of finale is very windows-centric, they may be being created as windows .ai files--there's nothing to show which.
My problem is that finale exports eps files that work just fine if I can just import them as is, but I have to export complete pages. If I open an eps page in PE to crop it, say, to get just the measures I need, it becomes very blurry in any page layout app I have access to. Whereas dropping the entire EPS produces a nice sharp image.