Help - can't boot

[Claude Jones]

I've pulled a real bad move. I stuck a three line script into
rc.local It just changes directories and calls up a python based
server app for spam filtering. My screen just hangs when I get to
that part of the boot process. Shelling out just leads to blank
screen. I need some way of getting access to rc.local and editing
out those commands. Can someone help - I'm lucky in that it's
booting enough to provide DHCP and routing services so I can send
this email from my laptop. 

Claude Jones
Levit & James, Inc./WTVS
Leesburg, VA, USA