Jon,
I have had a lot of trouble with my IRLINC learning IR codes from XBOX (well...it has trouble learning ANY code, but XBOX is the most difficult ). I believe the XBOX uses 56/57khz, which you appear to offer as an option.
Have you, or any of your users, had success learning the XBOX remote IR codes with USB-UIRT??. Specifically, I need to learn the DVD codes so that I can "NetRemote-to-HTCP-to-Girder-to-USB-UIRT-to-XBOX".
thx
Mike H