Looks like his limbs are scaled. You can sometimes get good results by scaling the body of the boots to like 104%. Try that. As for v3 on v2, I have done the reverse with a lot of success by simply taking a v3 clothes file and replacing the obj reference with the v2 obj. They line up pretty well. I've done a lot of V2 wigs to V3 head conversions easily this way and they fit just by using a v3 wig cr2 file and referencing the v2 obj.