Nec 6650 slimline and ibm T40 thinkpad compatability

I am thinking of buying a nec 6650 slimline internal dvd writer…
Has anybody installed such a drive to an IBM thinkpad T40 ? Will it work?
I cant get an ibm slimline dvd writer to fit my T40 for decent money in the Uk
thanks for your help (I have a cd-rw/dvd combo right now)