Removing LCD from Laptop

Hi All,

I have an old Dell D620 which is quite slow now, but still has a pretty nice display in it. I want to take out the display and connect it to an LCD controller board (or whatever is necessary) so I can use it as a secondary display. If there is an easier way to do this it would be great to know, but otherwise how do I choose the LCD controller board? Any help would be great!