Wow Jerry, I gotta say, the thought of putting a high-dollar "slide" transparency in an old projector fails the "pucker test" for me (as in, if I find that my backside clenches at the thought of doing something, I try to go another direction rather than tempting fate). That said, they're yours now to do as you see fit with them, but you've got a bigger pair than I do, heat shield or no
Keep in mind that these were placed in slide mounts to facilitate handling when used in production, not with the intent that they would ever be placed in a projector. If that's your chosen display method, it would be advisable to have a duplication of each one made to project and keep the original stored away. As far as storing them goes, just think of it like a negative and use the same kind of procedures as were talked about before in a not-too-long-ago thread. What you described sounds very reasonable to me. There are also 20-pocket pages made specifically for slides available. I've also been known to place individual slides in a standard card toploader and store them that way right along with cards, though that can get cumbersome if you're dealing with a lot of slides, in which case I strongly recommend the pages.
Craig, if you're ever doing to be working with anything larger than 2.5" or so, there are only a couple of consumer-level flatbed scanners that I am aware of for films: the Epson V700 and Epson 4990 models. Both are out of production currently (I think. Definitely the 4990 is not currently being produced), but can be picked up on eBay pretty frequently in the $300 range. Finding one with all the original film carrier templates is a little tougher, and will probably cost you a bit more, but depending on what you're doing you may be able to get away without them. Other than those two, you start getting into professional-level scanners, and the prices jump dramatically.