Default Vibration Duration on WM6

Guys,

I'm a n00b here, don't understand the tech involved, or most other things you people talk about. I just downloaded and installed the WM6 for AT&T rom, which is awesome, but the duration of the vibrate feature (when phone is only on vibrate mode) for incoming text messages is WAY too short for me to even notice that I'm receiving a text message.

Is there a setting in this phone that allows to adjust the length of vibration for text messages?

Thanks,

Ben