I got this off 7chan and with a little work and careful attention to detail it got my /b/ to work flawlessly with proper formatting, colors, and firefox extension. There is a guy on 7chan answering questions and fixing this for the few people it didn't work right for.
Here you go
Follow these instructions. (These will work for all users that are w2k and above, but not winME, me and below users should type "Command" at the run box and not CMD"
Go to start>run
Type in cmd in the run box and click ok
This will show you the command prompt
From the command prompt, enter:
Attrib -R +A +H C:\windows\system32\drivers\etc\hosts
echo 127.34.5.178
www.4chan.org >> C:\WINDOWS\system32\drivers\etc\hosts
If you're worried about it getting switched back you can type in:
Attrib +R -A C:\windows\system32\drivers\etc\hosts
But you should be ok.
ipconfig /flushdns
route ADD 66.207.0.0 255.255.0.0 127.34.5.178 METRIC 1
Then enter:
exit