Sand, there's a little slide switch down by the side of the drive somewhere. Slide it, and a lever will pop out. Then you pull the lever to remove the drive. Once you do that, try to close the tray.
.. the slide that Harry is explaining about can be seen in the Ultrabay device removal movie - ThinkPad T40/p, T41/p, T42/p, T43/p
- more T4x/p movies are fond in the Hardware removal and installation - ThinkPad T40/p, T41/p, T42/p, T43/p
. Of course, the Hardware Maintenance Manual - ThinkPad T40, T40p, T41, T41p, T42, T42p
is the ultimate source of information!
If you have a CD or DVD stuck inside a drive, then here's how to get it out: How to Eject a Stuck DVD/CD Drive
A while ago, there were cheap T4x CD-RW/DVD-ROM's for sale in the Marketplace on this forum; see FS: $10.00 T4* CD-RW/DVD Drives
- perhaps some of these are still available?