HI there Osiris,
1. Never shut it down. Ever.
2. See 1. (But no)
3. Yes, Mapped Drives etc no probs. Just add folders/drives to My Videos.
4. HDTV reception issues, decoder issues, guide setups, plasma vs LCD etc, pixel mapping, 50 Hz vs 60Hz, what TV tuner to choose, what video card, when is HDTV actually real HDTV, the list really does just keep going....
But that why we're

!!!!
Sounds like you're on the right track though, see you around the forums!!!
Cheers
TiggerK