Ok, this works fine.
Update the parameter mentioned above.
To recap:
Go to Tools > Options > Remote Control, and select Add and then Custom...
Click Add Run and enter:
mc17.exe
/MCC 10023,5
Give the command a name, such as Rating 5, and OK your way back to the Commands list. Select the command, and click Start Learning. Press the desired remote control button and MC will assign the remote code to that command. Click Stop Learning. OK out, and your done.