Hi
this is for user dddmod___ who was having some issues with mirroring capture weights - there is a series of tutorials covering this topic but they're not ready for publishing yet…
anyway - here is a quick, (poor quality) video of the Capture > Paint Weights > Mirror Weights workflow

Michael, can you take a look here? http://take.ms/YmV1U [take.ms]
What am I missing? While recording the video it does not copy the size to the center, here I did but it still does not work http://take.ms/NElki [take.ms]

your group is called “group_www”
but the capture mirror is expecting “www”

as for not being able to create the relative reference, I don't know why you're having trouble.