Please try to remember that this is a BETA, and as such may not be fully functional... if you find bugs or the like, please feel free to file them at the sf site or hit us up !
So, the quick and dirty of it is that all you will need to do is go to the Nessus website and download the latest Nessus tarball from them, upload it to the VM (scp), install it (pkg_add), start it, register it and run the /opt/Inprotect/sbin/updateplugins_1.00.pl script! Whew, that was one long runon sentence!. For everything to match up, create a user "inprotect" with password "inprotect" in your Nessus daemon. Once you have completed the aforementioned steps, you are all set and should be able to scan, note that if you want to scan outside of the VM, you will need to modify the configuration of the interface to be bridged etc... The interface is set for DHCP and everything will startup just fine with any address that you assign it or that it receives.
You will also need to throw the jpgraph stuff in /opt/Inprotect/html if you want the nifty graphs to work... but I'll probably speak more to this in an upcoming post.
I essentially used the install script to install in /opt/Inprotect on, you guessed it, FreeBSD 7.1R but of course had to make a few minor adjustments (it's not always 100% out of the gate) to get everything working together. That being said, you can probably do the same on your own distro.
some important info that you will (or may) need, i.e. username/password/medium
admin/password/inprotect web interface
phpMyAdmin is installed: http://ipofyourvm/phpmyadmin/ for your mysqling pleasure.
To access InProtect simply browse to the ip of your VM: http://ipofyourvm
If you want nmap, build it from ports: /usr/ports/security/nmap
Get the VMWare Image Here