Yes; V4.2 will work in P5. I use her a lot in P5. To avoid the annoying, but harmless version warnings; inject a V4 with all the morphs that you use, then save it to the figures library with a modified name ( for example: "V4-all morphs"). When you load the V4 you saved you will not get the version warnings. The "magnetize to V4" poses work too, depending on the clothing. (: