Hi, I'm no wiz with this stuff but I was fortunate to discover Cnet when I 1st joined the Computer generation so what I know is from there & learned to use forums. The I Pods are totally compatible with Widows & Vista & I've had Zero problems. I'm going to send you 2 links to Cnet's main Downloads pg. then their I tunes update pg. where you can read for your self editors & users reviews. At bottom there's a video where Cnet editors explain pgm. 1st.
http://download.cnet.com/windows/ Then select from list on left " I-Pod options. Then
http://download.cnet.com/Apple-iTunes/3000-2141_4-10235268.html?tag=mncol;pop
Please forgive me if this is old hat!
Getting back my experience, sounds like pgm. difference is 9 gives more options using I Tunes, check it out. My only issues with using two on same computer are that it makes a huge library which is common to both. Absolutely don't sync the Library & I pod do it manually.
Once I learned here that I pod songs can only be deleted from I Pods master song list I was happy to realize that they weren't being read as one by computer But this helped more, disconnect I Pod then go back to It Tunes Library Where you know can safely delete whole albums or just songs depending which list page your viewing. If you do it while it's still connected it will remove songs from I pod as well. As long as you don't use "Sync feature: It won't delete them! Sure Hope this is what your looking for! Forgive me if its redundant!
Best! Steve