Maybe these two items can help you out:
I think the R2 remote is a custom remote, uses a NEC protocol, 38 Khz Ir, custom code 866b. The remote decoder is made by Jaecs of Taiwan. I could not find any additional info on their site.
I have posted a question about it here:
http://www.hifi-remote.com/forums/viewforum.php?f=20and the button codes of the R2 remote codes here: