rp3-config will not allow me to delete modems. Already installed the rp3, ppp, and initscripts updates from errata page. Adding modems is no problem.
Please check that this is still a problem in rp3-1.0.6-1, which is in Raw Hide. It seems to work correctly over here with the latest version.
Thank you. rp3-1.0.6-1.rpm from Raw Hide fixed the problem.