Normal
Run the MP Configuration Utility, and go to General, then Keys & Sounds. Expand Global options and highlight Cycle audio language or type (you don't need to expand it). The lower section should populate with the parameters for that command. Click your mouse in the box that has the key assignment. Don't bother deleting what's already there. Now press the button on your remote that you want to use for switching audio. As long as the solution you're using for your X10 remote, is receiving some sort of signal through to the OS, from the remote, you should see the box get populated with a new (likely gibberish) character. Your remote should then be able to execute that command within MP. The former keyboard shortcut (A), will no longer work though. For the other, go in to the Windows section, instead of global actions. Expand Full screen video specific actions. Highlight the Zoom/Stretch entry. Highlight the key box at the bottom and press your desired remote button. Same restriction as above applies.
Run the MP Configuration Utility, and go to General, then Keys & Sounds.
Expand Global options and highlight Cycle audio language or type (you don't need to expand it). The lower section should populate with the parameters for that command. Click your mouse in the box that has the key assignment. Don't bother deleting what's already there. Now press the button on your remote that you want to use for switching audio. As long as the solution you're using for your X10 remote, is receiving some sort of signal through to the OS, from the remote, you should see the box get populated with a new (likely gibberish) character. Your remote should then be able to execute that command within MP. The former keyboard shortcut (A), will no longer work though.
For the other, go in to the Windows section, instead of global actions. Expand Full screen video specific actions. Highlight the Zoom/Stretch entry. Highlight the key box at the bottom and press your desired remote button. Same restriction as above applies.