IE 6 issue

We have a new prog our ihc deptt just made that they optimized for ie6 then when some websites were attempted to be accessed the message pops up that you need ie5 or better. Is there a seperate virtual machine or vba that needs to be setup afterie6 is installed that anyone knows of???

I know after installing XP with IE 6 you have to download a new JAVA VM via windows update. They weren't allowed to bundle it the the OS. Don't know if it also applies to stand alone IE 6 installs, but it might not be a bad idea to check.