I'm currently running several flavors of *nix under Hyper-V that are not officially supported some with greater success than others. I understand that 'supported' and actually working (or even working with limited functionality) are different things. But like I said, this is probably the wrong forum to raise that complaint. I am completely devoid of a reason they put an UPGRADE version in their TechNet download area, and not a standard version. My observation was simply that Microsoft ONLY offers MS DOS 6.22 in an UPGRADE version, which needlessly complicates getting it going on a test machine (virtual or not). Unfortunately, MS-DOS is still required for some applications that just won't die and testing IS a required part of supporting those apps. There's an entire list of OS's there that fall into this category.
TechNet obviously offers MS DOS 6.22 for subscribers to use, even though they have long since stopped supporting it. I realize this is a Hyper-V forum and not MSDN, so my first question might not apply here.
Thanks for taking the time to answer my questions.