You can scale them by adding e.g. scale = 30 (30% of normal size) in the associated .fpe file (found in user\charactercreator folder).
The character creator entities are made up of composites, so when you then load into editor the body looks scaled but the head isn't, though when you run the game the whole body does scale. However, any weapons attached don't scale ... so looks odd (funny). The collision box also doesn't appear to adjust. Also I didn't try this in a standalone, so as others have mentioned you may have issues there.
Don't think the CC characters are really designed to be resized at the moment.