Questions about .Apple 20" Cinema Display with a PC

Hello everyone. I have spent the last few hours searching google for
some answers to these questions without much luck, so I thought I
would post them out there and see if anyone can help.

I have a Pentium 4 3.0 GHz, with an ATI Radeon 9800 Pro video card. I
am running Windows XP.

I am interested in picking up an Apple 20" Cinema Display. I know
some people have had some luck with this (especially with the ATI
cards), but I still have some concerns:

1) The native resolution for this monitor is 1680x1050, and although
the ATI drivers support it, some people have reported problems seeing
anything on the monitor until Windows boots (thereby precluding access
to the bios settings). Can anyone confirm if this is true? I would
have thought the PC would try to put the monitor into some other
resolution that it could handle.

2) What happens if I pick a game and try to play it at 1024x768 or
1280x1024? Does the game get centered in the monitor or does it get
stretched? Is that something that is configurable?

3) Has anyone had success hooking up an Apple Cinema Display to
multiple PCs that have DVI outputs? I have read that some people had
problems hooking the monitor to a DVI switch box using the ADC to DVI
connector. I know Gefen has an ADC switcher with the ADC to DVI
converter built in to it. Has anyone used that with any success? I
noticed that some switch boxes claim to "support" 1600x1200
resolution. Both Belkin and Gefen's lower end models say that. Does
that mean that they would not be able to support the 1680x1050
resolution of the Apple display?

Thanks in advance for any answers you all can provide. They are much
appreciated!