I tried fixing a problem with Compressor and in so doing messed up my Mac. The recommended solution was to rename the hostconfig file in /etc/ to hostconfig.old. I assume a new hostconfig file should have been created at boot but no luck. Now my Mac opens to a UNIX shell. I tried going into /etc/ and renaming the hostconfig file but it won't let me as it is read-only. How can I rename this file? I'm not very familiar with Unix but I assume it's a chmode command. Also, I assume I'll need to log in as a root user but when I try that it won't accept my password. Please help!