Belarc Advisor will give you the product code for your installed software.
http://www.belarc.com/free_download.html
Also, if you do put your drive in the freezer, seal it in a airtight bag, and try and put some of the silicon packets in it to prevent condensation from forming on the platters.
Edit : Now that I have read your last post - ignore the part about Belarc Advisor