Have you tried googling this and see what comes up?

Twinkie, have any luck with Google?
May not be in the Library, try a Code search, if still nothing, there are remotes that Learn from the original Remote.

Twinkie, have any luck with Google? You suggest Google a lot, they may have Googled and found this site only to be referred back to them?
Try here: Universal Remote Control Codes
May not be in the Library, try a Code search, if still nothing, there are remotes that Learn from the original Remote.

http://www.comcast.com/corporate/customers/customer_support/remotes.html

Check there, it should help. :)