I haven't seen any "true" discrete codes for the Outlaw 1050. What you're currently doing is basically what I do and what I've seen others doing.
If you haven't been there, and you probably have if you own a Pronto, go to:
http://www.remotecentral.com They have a TON of codes there for various equipment. For the Outlaw 1050 specifically, you can go to:
http://www.remotecentral.com/files/c-outlaw-receiver1.htm There are 3 CCF files there for the 1050. I did one of them, but didn't include the radio stuff. I haven't looked at the other two.
Todd