...not as impossible as you may think, my dear boy. It is possible in some cases. Though whether or not it's worth the considerable time it takes is up to you to decide.
Although Laptop LCDs use special ASICs to function, even these have to conform to some sort of industry standards. Surprisingly enough, more often than not many panels fron different manufaturers will conform to the same specification.
Then you need a way to get your PC at home to actually drive the LCD in question. And this is where you have to spend some money. Earth Computer Technologies (www.flat-panel.com) makes a nice line of LCD controller based Video Boards just for this purpose. They have many boards so that if you're willing to to pay the cash, you can drive the panel. While their cards are on the steep side, they are (at the moment) still cheaper then a VGA-Input Desktop Flat Panel.