Someone must have crossed this bridge, I can't be the first...
I've been using fat32format on my R4 with 80gb drive for 4+ years. The computer I used was XP and it worked great. That computer died, so I'm using another one which happens to be windows Vista. When I try to run fat32format it says "access denied".
On Vista (and Win 7 I believe) when you want to get into anything system related I get the popup which says "please verify that you want to do this". I presume the fact that I didn't do that is preventing fa32format from doing it's job. Maybe I have to use a "runas" or something? If someone has a Linux command, that's fine too.
I'm headed off to Gathering of the Vibes festival. I'll check back in a few days to see if anyone has ideas. For today I just deleted all the files and folders.