OK. I will say this right now. By portable, he means handheld. There are only 2 people who have proof of making a GCp. LCDs are not expensive, because for a portable project you use no greater than 5", which can be ripped from a PS1 screen or HipGear LCD pad. For batteries, you find a good rechargeable from something like a camcorder. You guys know electronics, but you don't know a thing about portablizing systems. **broken link removed**.
Oh, and BloodNess, no offence, but there is no way that you will make this thing.