There is a way. I have done it before. It is extremely jank but It works. I installed 4 3mm leds into my UMD door, and I kept the umd drive in, it looked nice. Well It turns out if you tape down the tabs that close the circuits that cause the laser and gears to operate, the drive will activate. And then if you take the "disc" out of the UMD "housing" you can stick it in. The black thing which it rotates on is magnetic, It will snap right into place. So I put a UMD in and it read it fine. With the door open of course. I put the leds really close to the ring, so the disc didn't have enough space to close. If you put them far enough away from the center on the door, you should be able to play with the door closed.
Just a though :3