1) You can use this for the theme
and this for a more XP like taskbar
2) I have windows home premium and I have no "Folder Issues"
3) Not that I know of
4) Theirs a Rivatuner for Windows 7
Hope this helped. Also you could set a Windows 7 - Vista
Dual boot to test out Windows 7 and if you hate it you can delete it.
Hope this helped