As Wendy mentioned, saving the weight maps only works for Poser style figures.
You can save the weight maps within the scene, so as long as you don’t detach the skeleton from the mesh, you’re A-okay. What this means is, if you’re happy with the rig and weight map, save the character to the browser and then load it into whatever scene you need and the weights maps will be preserved.
I should add that you might want to save them as an animation group, as then you’ll get an NLA track to make/use NLA clips.
Thanks for your reply evilproducer. I’m familiar with the implications of saving a scene and using the browser for saving characters, props, etc. And I almost always use NLA tracks/clips when animating.
It appears what I want to do is not supported with custom characters. So, if I don’t want to keep starting over when refining a rig/skeleton, I should use another tool.
Sorry I couldn’t be much help. It’s kind of a PITA not to be able to save your own weight maps and quite frankly, I’m not sure why you can’t. I mean, if you can do it for a DAZ/Poser figure, how hard would it be to implement for a Carrara built mesh and rig? I can’t speak for anybody else, but I’ve never felt the need to weight paint a DAZ/Poser figure in Carrara.
Sorry if I my answer covered ground you’re already familiar with. I figured a little extra information would be good because I don’t know the skill set of the person asking the question. This way, if the person asking is familiar with all or parts of the response, somebody else perusing the topic, or with a similar issue might not be.