Hi, Im one of the 5 people who use Vista and really like it

anyway, Im running vista 64, like anyone im curious about 7, a few questions:
1: do vista64 drivers = 7 drivers I.E. will my track IR, cougar HOTAS, etc etc all still work?
2: can it be uninstalled without fubaring anything?
3: am i requried to do a clean install I.E. format then reinstall or can I "upgrade" from vista.