Hi,

You could purchase a laptop HDD caddy.

Most SSDs should fit into the caddy with the screwholes lining up.

Here is a link that shows how to remove the HDD from a T41 laptop. Just reverse the procedure.

http://www.laptopinventory.com/LaptopInv...

Here is a link, from just one supplier, that shows what a caddy costs and looks like. There are a lot more suppliers if this one doesn't appeal to you. Just search online for Thinkpad T41 HDD caddy.

http://www.tmart.com/Hard-Drive-Cover-Ca...

You may have to pack out the SSD a bit if it is thinner, to support it (even with the screwholes lining up) , so as to not place too much stress on the connectors. Any foam or rubber type material should be suitable.