I got it. For when the phone needs to be in vibrate mode (i.e., at work), the setting to change when voice mail is coming in is SMS TEXT.
I have it also using the Notifier_Lightspeed but adjusted the volume to low and the # of beeps to just 1. In the remote chance of a call during the few meetings we have here and there, the phone is set to vibrate but the voice mail notification will now give me one beep at low volume.
This way I won't miss out on any job opportunity. I'm in a short-term, low pay contract, so can't miss _any_ of these calls, either.
Thanks everyone. I'll check out that buzz 3rd party, though. There may be options there that are better than the built-in BBPrl8203 ones.