PPCGeeks - POutlook from WM6 in WM5?

I've seen a few references to this, but no answers and/or solutions. Does anyone know if it's possible to put the poutlook from wm6 into wm5? I would guess theoretically, it should be, since it's just files. But I have no idea which ones, or if on a non-upgradeable rom phone (treo for instance) they could be replaced.

I saw a thread on xda stating that the Office Mobile 6.1 upgrade allows html email in wm5, but I tried that, and it doesn't do it :( Can't do wm6 on a 700wx and html email is a big issue for me (via activesync - even flexmail won't do html email in that, only pop/imap)

Any ideas? I'd really appreciate anything anyone might know :)

Thanks much!