JP's method is valid but it's a lot more involved and definitely not beginner friendly. Plus you'd end up with all your figures looking like M4/V4, which you already have so I don't really see the point. But regardless, it's much easier to convert an existing clothing model to fit a different figure, even if it means you have to do the same process for every piece of clothing you want that figure to wear. But fitting it to the figure's shape is the hardest part, and can be done in Poser with the morph brush and magnets. And depending on how the original model was built you can completely change the groups if needed without leaving Poser.

Once the clothing matches the shape of the figure you want wearing it, in its default state, it's easy to transfer the rigging and morphs - rigging via fitting room or setup room and morphs via the figure menu in P13. 

P13's morph transfer is actually pretty good. I've transferred morphs from one figure to another with completely different geometry and group cuts and and the end result is usually pretty flawless. This is not true in P11 or earlier.

If you can use the morph brush to adjust poke thru then you can use it to do most anything else you'd need it to do.