Sound guy,
I know how you feel I had to make the same decision last January.Very tough to make.I didn't think Id ever be able to face the Vet again. (He is a friend). I was very mixed up and had a hard time staying composed. I did find this site.
http://www.ilovedmypet.com/
I found it to be very good for closure. and sent a link with my memorial to my family and friends. Its free for a period.
A pet is hard to loose.
Allan