I would go back to a linux boot floppy. That should give you the ability to mount a browse the hard drive and get all the info that you want. You may not be able to run all of the programs, but you should be able to get a good overview of what is on the drive.
You could probably also figure out what port VNC is using.
If you know what IP the system has (is it getting one from you dhcp server? look at the leases), you can get a port scanner to see what ports that machine has open.
LANguard Network Scanner: That should find the open ports on the machine.