Would definately be a boon to your quest if you can find a PAL xBox, in the wild and just try it ... prolly not gonna happen.
Hell ... It's just $30 That's what I paid for a fancy brunch, with my daughter, this morning.
The moral? Tell your kid to eat Cheerios (oat based breakfast cerial) , instead, one of these Sundays.
Seriously, tho ... The newer your monitor, the more likely it would support the PAL input.
I am Typing this on a 52" LG5250 HDTV, right now, and this display has amazed me at the very wide range of formats it can process (automatically) ... I'm using a DVI Adapter and the exact model was automagically sensed and these nVidia drivers seem to let me do just about anything I can think of, with two HDTVs.
My long winded point is that I have (somewhat intuitively, and by deduction) that it is just cheaper to manufacture one processor design and have it be "GLOBALLY COMPATIBLE".
I mean ... Arent ALL the InTEL core processors based on the SAME Nehalem Die? Are not ALL Ati 5000 series cards based on the same die, and just bin sorted and "hobbled" accordingly?
I mean, this has even happened (just recently) in the Professional; Camcorder Market ... MANY of the latest ENG cameras do both PAL and NTSC, now (several do not, tho).
Bottom line ... you would have to try it and, like I said, the Audio is the really hinky part.
= Al =