RDC is a very nice piece of software with a few quirks. First, it won't run with win98

but only with 2000, 2003 and XP. Then, I didn't find a way to emulate the Windows key on the mac keyboard. Finally, while pretty fast with a 100 Mbps hub, games other than Solitaire would be totally unplayable : too much lag in refreshing the screen.
Maybe a Gigabit ethernet link would do it for games, I don't know... I use it to run PC only programs (no games though) and it's very handy for that. My iMac G5 screen is much, much, much better than my old PC CRT piece of crap.
Hope this help...