There is a content development kit for PE available on the site with a similar name as this one, where they also sell the 'X' version. Rated USD5.- it is a beta version and it comes with development versions and a set of instructions how to refit V4 stuff to PE, and also a morph for V4 to PE shape. You inject the morph into V4, zero V4, apply the hair to V4, and copy the morph from V4 into the hair.

Also there is the Prefitter-cr2 available in the store here, and a PE injection morph (sold separately).