I think it's possible, check if the command V.AUX is the correct one to use. In some cases you have to use the actual number instead. (for example L-V.AUX = 130. I'm using this command to activate EyeTV)
if command is 130 then ....
TIP: If you want to see which IR-code the BeoPort is receiving add the following code in the FrontRow-script:
In the end of the IrCommand()
return {source,command,linkbit}
Then you can see all the IR-codes in the SystemEvents