I have two separate light sockets, and I was thinking about combine them together. I know it is possible to record the signal in RAW, but is it possible to combine the non-RAW file as well?
Unfortunately, you can’t.
This is a known limitation, developers and manifacturers want to make life difficult for those who want to create .sub sequences to brute force devices.
If the two remotes transmit on the same frequency, the best you can do is record them as a sequence (and eventually edit the resulting raw file), or create a new proper one.