I don't have a list, but i'll teach you how to fish. Each command is 4 bytes long (even though the protocol says otherwise). All numbering is HEX. Every command begins with the same 2 byte start code 45 B5. Next is the function code. This is the 2 digit number next to every command in the first post. For pause it's 00 for play it's 15. The last byte is the tough one. The protocol calls it the "reversal of the function". To get this number you need to subtract the function code from FF. So in our example:
pause: FF-00=FF
play: FF-15=EA

How do we subtract numbers from letters?
1.) Open up the calculator in Windows (Start>Run>Calc)
2.) Go to View>Scientific
3.) Check the Radio Button for HEX in the upper left corner
4.) Do your math.

Hope this helps.