If it's c/installer rather than c:installer, it might be the version of installer that's on the disc causing problems. Try using the standard 3.1 version from your install discs. Change the tool associated with the 3.9 install icon, or start it from a CLI.
Have you installed all the setpatches necessary for the 060 in your startup-sequence or user startup? I don't know if any patching is necessary, but you might want to check it out.
I don't know that this'll work, but it might get you a bit further...
Good luck!
