LCD Screen question

I have an idea that I need help with.

I want to diplay video with an LCD (or some other display). I have a 6"x6" window to work with, and about 1.5" depth for the screen. It also needs to be mobile. I dont even know where to start! If I bought an IPod Video or PSP, could I hook it up to the screen? That would be ideal. Does anyone have an video knowledge, or a site they can point me to - thanks peoples