Well then have you thought about turning off UAC??? Then you wont be prompted.
Shocking i know. A way to work WITH Vista and still get stuff done. Plus your whole not backwards thing. Yeah WRONG. Use a XP Cd...put it in the drive. Install XP. Wow that was hard to go backwards.
As for Office every application has 1 small setting you can setup to save the forms in the old style and not with the new style. I know hard yet again.
The new stuff is not that hard to use. It is not that hard to work with. Vista is fast and stable. At least for me.
If you dont like it buy XP and install it. Simple as that.