I'm wondering how MacOSX, and specifically an '08 iMac w/ a 8800GS GPU, will handle a dual-monitor setup? Can the secondary display run at a different resolution than the native display? Sorry, new Mac user here and have a new iMac on the way. Wondering if I'll be able to make use of my existing LCDs. I've gotten used to running w/ dual displays at work (on a WinXP laptop), and really like it.