Collison setups that are magnet based need very little keying information in them at all. Basically all you do is create a conforming character that has nothing more than magnets on the bones that are set up for the collisions, and a file to make all of them affect the character(s) body parts you want them to affect. Once you have it set up, you just load it just like you would clothes, conform it, and run the pose file to make it work on the character, clothes, etc. The picture above is just a simple hand setup that I made, it is in my Poser 6 runtime, so it has been possible for many years now.

There are a few reasons you want them on another skeleton. One is, you can use it with just about any character that shares the bone structure with very little work.  There is nothing for them to affect on the rig it is on, no geometry at all. You can just select what you want them to affect to keep memory usage down.

If you are going the clothify route, many of the hidden cloth room settings dorkmcgork mentioned in another thread come into play.

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