IIgs newbie question(s)

[jruschme@exit109.com (John Ruschmeyer)]

I've recently started fooling with a IIgs (my first one, though I've been
fooling with Macs and Apple IIe's for a number of years). It's the 
usual $5 Salvation Army model: 

	ROM 01
	256K on memory card
	keyboard
	mouse (missing a teflon pad)
	5.25" floppy
	no docs
	Some yellowing of the case

For another $5, I got the matching monitor (minus cable).

I've scrounged up the correct 3.5" drive and updated the memory card to 1MB.
I know I need a hard disk controller and/or a copy of AppleShare 3.0 to
really make this useful.

Some questions though:

1) Do I really need the HD or AppleShare? Any way to floppy boot GS/OS
   enough to use a folder shared from regular Mac file sharing?

2) I want to install my old PCPI Applicard. I know that in a IIe, I would
   just drop it into an empty slot. As I understand it, on the IIgs, I
   need to go into the control panel and change the setting for the
   particular slot to "your card". What I don't know is the following:

	- What slot should I use for something like this?
	- Do I "lose" anything when I set the slot to "YOUR CARD"?
	  (i.e., if I put the card in slot 4, which is currently
	  set to "mouse", do I lose the use of the mouse or the
	  emulation of the //e mouse card?)

3) I've got a spare Workstation card (no docs or software). Anybody
   want to swap for a SCSI or IDE controller?

Thanks in advance...
<<<John>>>