1) only after a warm reset (or if you use real USB-cards like the Algor or a HighWay + ROMulus-update :-P ).
2) Only OS-friendly games.
3) Yes.
4) Yes (I think you need to install the Fat95-stuff if you use Win-formated media/drives).
5) Register Poseidon, register Poseidon, register Poseidon ...... :-o