If anyone wishes to correct me on this then feel free lol (you all know who you are [

])
First if you were to use just the "head" from a Haptek charcter then as far as I'm aware you can pretty much create any kind of character you feel like (your demon) using Hapteks brilliant "PeoplePutty" program.
As far as your case mod goes, I make a few spare change from doing case mods...and I would imagine that the simplist way to have "hal" in the lcd window would be to somehow to program/wire the lcd screen as a second monitor then you can choose to have Hal seperate from your main monitor.
Not something I've tried or been asked to do yet as all the lcd screens I've ever installed have actually been for a purpose (fan speed/temp settings/lights etc).
Anyone else any further thoughts/ideas?