I did some research around the net for a DNN skin I am working on for a client.
I am updating the current skin to a much more streamlined and content-oriented version.

For this skin I am implementing element hover properties.

There isn't a lot of information for those who have wanted to do what I have done and I thought it would be nice to share my success.

Problem:
Implement pure CSS :hover for IE browsers

Solution:

• Download the whatever:hover file from peterned (a google search for whatever:hover)
• Name it whatever you want
• Place it in the DNN_ROOT/js folder or any other folder in the root DNN install path that is accessible by direct URL
• In the site root Default.aspx add the following code:
  <!--[if IE]>
  <style>
  body { behavior:url(http://www.mywebsiteaddress.com/js/csshover3.htc); }
  </style>
  <![endif]-->
• Setup your CSS hover menus
• Test in IE

That took a bit of research I hope it helps someone.

I would an XHTML doctype and use the js if IE < 7, since in that case only IE 6 does not support hover on non link elements.