Editing in FCP X for a Multi-Channel Video Installation

Hi--

I am a grad student. I would like to edit for 2 videos that will eventually be projected side by side in my thesis installation. I have both FCP 7 and FCP X on my machine (VERY NEW (within 24hours new to FCP X). Is there a way that I can do this? I first thought that making a canvass that was 2560 by 800 (doubling the native resolution width of my projectors) and then connecting my computer to the projectors and splitting the screen was the answer---but that is really an editing nightmare. I need to see both videos next to each other while I am editing...because video is moving from one screen to the next or taking up both screens. Can anyone point me in the right direction...? Preferable to tutorials for FCP X or give me the vocabulary for search terms that might help me find the answer. Thank you so much!

Yeah, you are correct. I figured that out last night. I read on here somewhere that Motion or AE will allow me to export to a custom aspect ratio.