Thanks to all who posted or emailed...
EPILOGUE:
The problem seems to stem from my old version of E-Prime defaulting to a lower-resolution output (640x480 @ 16 bits Color).
The solution is kind of a good-news/bad-news thing...
The good news: When I edited the display device feature and upped the resolution to match the nice monitors in our computer lab (1280x1024), those high rez .bmp images looked absolutely AWESOME!
The bad news: Changing the screen resolution meant that just about all the my slides and screens, which were built to the old display paradigm, needed to have their images resized, and in some cases, have the objects in the slides re-positioned or rebuilt. Basically, it's a total rebuild now, of a pretty complex procedure - containing text entry, object rotations, and custom built slider scales (a slide that has roughly 100+ objects within it), all of which had to be redone.
The moral of this story: if the screen resolution is important to the procedure, take that into account as the very first thing, make the appropriate adjustments on the display device settings with careful consideration of what machines you'll be using, then build the rest of the program from there.