What I've done in the past to make the P4 man heavier is use a magnet deformer and spawn a morph target for the addomen, then repeated the process with the superior pelvic area so that there is a gradual transition. You can also buy morph targets to make P4 figures heavier online here. There was a free morphed Fat Dude offered here at one time which looked good, but then there was a stipulation that came with it that it wasn't to be used for commercial projects, so I never installed it. If you use the nude figures in P4 your clothes won't conform after you make them fat. You'd have to use a utility like The Tailor to transfer the morphs to the clothing. Using the clothed figures might create unwanted distortions, but you can give it a try. The P4 casual man would be a good one to use to experiment. P2 figures won't look as realistic. The new P5 figures have better fat morphs and with the cloth room you probably could get clothes to conform using collision detection, but I can't swear by it. Anyone who has more info. on this please speak up. I don't like Don and Judy and haven't used them much. The heavy man and woman from Daz are now on sale very cheap at the loft. Rather than going through all this work you might want to check that out. I believe they are less than $20 now and are fairly realistic if not used in close ups.