Forwarding/voicemail question

I have an additional phone line that I use for running a musical group that I have forwarded to my regular phone. I would like to have the calls forwarded from my music line to my regular phone but if I do not answer I would for the caller to receive a different voicemail greeting than if they called my regular phone directly. Is there any way to accomplish this?

My standard phone is a blackberry storm. My music line has a samsung trance which is basically just turned off.