if u need numbers you can either do what I posted in the begining, or open a few new google voice numbers from scratch (by sending an invite from their web site this way they come with 3 invites) & since you need it for incoming they have to be fiinalized, so finalize them to phones in the store (one person by computor in house & one in the store answering the phone) then set the settings not to forward to store phone. then set up as temporary # to ur phone. Look its quite easy!!!!
(i don't really think this is limassah but its a good shtick)