I'm working on fixing an issue with the installer that I provided for the E61.
As I noted, it requires an Administrator password.
This should be unnecessary, and might be a cause for NMT to not recognise phones right away. If you have problems simply move the e61.profile file from /Library/Application Support/Nokia Media Transfer/Profiles off the Macintosh HD to the same folder from your home folder.
This really only affects the initial E61 profile -- the rest you currently have to copy yourself anyway.