Vista 32 (Home Premium is what I have) allows 4 GB, but 3GB can be actually used with Vista HP.

I have a Vista is all about the Media Center, and I really haven't had much trouble with Media Center on either my Vista box or my XP Media Center box.

BTW, I am currently runnning Vista SP1 (found the download link from an RTM at a forum), and it's slightly better. It does copy files faster over a disk and from other disks. I had no trouble installing it, although it did take several hours after the several hours of downloading.

Now I'm just  waiting on SP3 for my XP box.

-- Jeff