asterisk users - Sep 2012 - ConfBridge announce_join_leave custom recording?

Hi list,

I couldn't find any ConfBridge option to specify a custom recording to 
be played for announce_join_leave ("After the tone, say your name and 
then press the pound key")?

Is that not possible or am I missing something?

As a workaround, I could probably specify another language and replace 
the vm-rec-name file?

Thanks!
Markus