[Serusers] Call Forwarding (No-Answer, Busy)

I've been attempting to implement some call forwarding (noans, busy) logic into my SER script without any luck So far i've tried CPL (which doesn't seem to work at all for call forward busy and apparently doesn't work properly with no answer) (I must say, CPL seems like an excellent feature. Its really a shame that many of its useful functions aren't yet supported in SER) I've also tried setting the "fr_timer_avp" TM parameter from an AVP database and trying to forward the call once the timer expires, so far this has proven fruitless. I'm curious if anyone has found a solution to this problem, or if it possible.