I've just installed 5.06 and when I try to start the game I get a message about data folders. I realise that this has probably been addressed on a thread somewhere, and that the solution is probably extremely simple, but I haven't been able to find an answer in two hours of looking on the forums. While I have a great deal of admiration for the Circle of Eight, you might want to think about investing in a FAQ that actually allows people to browse for solutions. That way you wouldn't have to answer the same questions over and over.
Either DL and use the new Front-End (it's supposed to address the issue), or read and follow this post with the old one: http://www.co8.org/forum/showpost.php?p=73766&postcount=1169
I'd like to add that the only officially supported way would be to install the new ToEE Front-End X. The older front-end is officially declared obsolete and is no longer supported by the Circle of Eight. - Agetian