Dave,
Here are samples of omniremotes X-10 RF codes. It is for house code "A", Device "1", "ON" and "A", Device "1", "OFF". Do you have an easy way to figure out how they are formated?

A1 ON:
00004856 7FFF8051 15545444 44555544 44444440 00000000
00000000 3FFFC028 8AAA2A22 222AAAA2 22222220 00000000
00000000 1FFFE014 45551511 11155551 11111110 00000000
00000000 0FFFF00A 22AA8A88 888AAAA8 88888888 00000000
00000000 07FFF805 11554544 44455554 44444444 00000000
00000000 03FFFC02 88AAA2A2 2222AAAA 22222222 00000000
00000000

A1 OFF:
00004856 7FFF8051 15545444 44545551 14444440 00000000
00000000 3FFFC028 8AAA2A22 222A2AA8 8A222220 00000000
00000000 1FFFE014 45551511 11151554 45111110 00000000
00000000 0FFFF00A 22AA8A88 888A8AAA 22888888 00000000
00000000 07FFF805 11554544 44454555 11444444 00000000
00000000 03FFFC02 88AAA2A2 2222A2AA 88A22222 00000000
00000000

Ugly