Adding additional ports to scan

[mark-wade at comcast.net]

I am running nessus version 2.2.0 on Fedora Core 1.  My question is that I would like to add additional ports to check during a scanning phase (i.e. Prefs or Scan option tabs).  The ports that I want to add are in the hundreds, so I don't want to just manually add them to the section that allows you to add additional ports.  I have found the services.tcp and services.udp file in /usr/local/var/nessus file.  I see how I could easily add them to the services.txt file, but I know that I would have to add them to the binary files (services.tcp and services.udp file), but I am not sure how to do that.  I can read the file with strings, but am not familiar enough with *nix to append to the file and then I guess recompile???  Thanks in advance for any help that is provided.

mark