Have a look at the ibm homepage for the manuals on your model thinkpad, thatll show you exactly where all the screw are.
You can get replacement parts on ebay quite cheap but you have to be absolutely sure youre getting the right part.
Also a lot of the screws are covered by little black plastic round bits, prise them off and undo the screws underneath.
Hope this helps,
Mark.
Mark, November 2005