I've got a Belkin OmniView Pro4, and the hotkeys for it are ScrollLock+ScrollLock+UP or Down arrow. I never really have a problem with this interfereing with anything else, cuz how many people actually USE the scroll lock key? Even in games you don't use it very often.
Now with the Non-Pro editions I do know that its CNTRL+CNTRL+(A,B,C,D) to change screens...this however could be a real problem during a game.
Neither of them are programmable to my knowledge.
Good luck
-Javic