Call Wave is nothing like Instincts VVM, Phonefusion works just like VVM on the Instinct with extras. Run through this thread:
http://sprintusers.com/forum/showthread.php?t=178382 it is very informative. Also, I have been using Phonefusion for over a month I haven't been charged forwarding fees, Tier2 Tech Support Business can enable the Conditional setting on your account/device.