Odd that it can't learn from the 990's remote. My old Sony RM-AV2100 was able to learn commands from my Model 1050's remote (which was also a Catalyst48), and a buddy with the RM-AV2100 learned similar commands from his Model 950's SL-9000 clone (which used many of the same commands).

I don't know of any Outlaw codes for the Sony remotes. My suspicion is that Sony probably doesn't have any Outlaw codes in their database - aside from the ability to do learning (at least in theory), they may not be interested in investing the effort to incorporate smaller manufacturers like Outlaw into their code library.