one thing to also think about is you can detach the receiver from the 4 in 1 and add in the connectors you need and just add the gyro and stuff. Look here for more info
http://www.rcuniverse.com/forum/m_52...5/key_/tm.htm#

Also if you don't want to go that route... all you need to do to upgrade your cp to a cpp is 2 heat sinks (one for main and one for the tail), a lipo, a lipo charger, the canopy (optional), a 9T motor and some blade grips and mixer arms. I figured it out a couple of weeks ago, and it would run about 90 bucks from horizon hobbies, plus shipping.

here are the links to the blade grips and mixer arms
one of these
http://www.horizonhobby.com/Products...rodID=EFLH1171

and one of these
http://www.horizonhobby.com/Products...rodID=EFLH1172