downgrade sid to woody?

[Kevin van Haaren <kevin@vanhaaren.net>]

I messed up my machine a couple of times running unstable (huh, 
wonder why they call it that 8-) anyway I want to downgrade to just 
woody.  I dug through the apt-get and dselect man pages and didn't 
see a way to do this.  Is it enough to remove the unstable references 
in sources.list and run upgrade?  or will that leave some of the 
unstable packages in place?

Thanks,
Kevin