I know this thread is a little older, but I would like to know this too. I'm working on a unusual mesh which is on the wider side, and the arms are clipping into the torso. Have you been able to find out how to increase the ditance by now?
Not exactly sure how to do this in TSRW but it's something to do with the location of the slots, by default Sim's hand bones are connected to the left and right thighTarget slots when idle standing, if you can find those slots in the outfit and move them outerwards using the values, it should work out.
- When one gets inspired by the other, the one inspires another - Anything is Possible.