1. there is none, to reset the unit you pull the battery out if the unit is unresponsive, or just flick the battery lock switch open and closed again if its working fine.
2. There isn\'t one. You can simulate CTRL+Z / CTRL+X / CTRL+C / CTRL+V by using FN instead, but only for those keys. The X11 ROM remaps the Calendar key to Control though. It\'s also possible to remap the 2 japanese chars to Control and Alt, just poke around the FAQ\'s / How-To\'s to find that info. This will include information on remapping keys.
3. I have no idea.
4. If you\'re into the old-school things I\'d take a look at the X11 ROM. Lot\'s of nice features