Its pretty easy to do, just extreemly expensive. the easiest part is getting the LCD screen, then you have to find a controler for it at somewhere like
www.earthlcd.com. The controlers alone cost about $200-300. You also need power inverters for the screen if the screen doesnt already come with one. The cheapest way to use a LCD screen with your computer is to use a screen that accepts NTSC input, which are usually pretty cheap compared to vga. Then you just connect the screen to the tv out on your video card, if your video card has it. The drawback to NTSC input is its not digital, which means the picture quality really sucks.