I'm not sure about how some users do it, but you can do it by using frames, you would just have to tweak it a lot, you will have to put the frame borders really tight for it to work right, I think the latest version of UBB allows you to do this in it's control panel options, I don't know if thats true, its just a rumour I heard.
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If bullshit could fly... College would be an airport