here´s one i never thought possible...
i am using Project 64 to play those good old games i miss so much... and even though the emulator can render at any resolution your adapter supports, most games look terribly distorted when using any resolution outside the 4:3 aspect ratio range...
but Zelda runs almost perfect on 3head, no distortions and it is Hor +
you have to check the 'adjust game aspect ratio to match yours' box in the project64 advanced graphics settings menu, or else the whole game will stretch to fit your screens, but with this option checked, it is as if the game was made to run in 3head resolutions... even the interface will stay in the center screen
the only drawback is that areas with flat 2D pre-rendered backdrops (like the entrance of the temple of time) appear stretched... but the cylindrical mapped areas (market or link's house) appear just fine.
goes without saying that playing this game on the PC with a gamepad and 3 screens is just sweet :D
Cheers
HarvesteR