How badly do you want to find the codes? From other threads here, we know that the Xtreamer uses the NEC1 protocol, device 0. The only function number we know is Power toggle, which is 4.

Since you have a OneForAll, it is possible to custom program the remote. This assumes that the 7960 has the same capabilities as older OFA remotes. You can assign one of the many setup codes which use NEC1, device 0, and then try each of the 256 possible function numbers. This will take you about 30 minutes. Then you can assign the valid function numbers to the remote buttons.

For example, you could assign setup code Video 0770 (or 20770 if the remote uses 5 digit setup codes). Then, to test one of the 256 possible function codes:
1) Press Magic briefly
2) Enter 00000

To test the next function code use 00001 in step 2) and so forth up to 00255.

Just to make sure that the procedure works, try it first with 00180. That should be Power toggle. Of course you'll want to write down each function code that generates a response, and what the response was.

Once you have known working function codes, assign them to buttons:
1) Press Magic until 2 blinks
2) Enter 994
3) Press setup (2 blinks)
4) Enter e.g. 00180 (Power toggle, in this case)
5) Press the Power (or other) button
If successful, the remote will blink twice

If you decide to do this, please post the results of your search. It will save someone else from having to do the search again.