monitoring microphone through headphones ONLY DURING PTT?

[vizniz]

I've been searching for an answer to this, but havn't found one. Sorry if this has been posted before.

I recently got a pair of nice over-ear, closed headphones. Love the way they sound, but it makes speaking in ventrilo strange because i can't quite hear myself.

I turned on monitoring in my operating system (win xp), but it's kindof annoying to hear all the time (keystrokes, clicking, etc).

Is there a way to enable mic monitoring so that it only does so when i hold down my mic bind? I figure this would be a ventrilo option, if it's possible.

Thanks in advance.