Re: IE & menu
Well... I hope it's obvious you'd need to at least modify the CSS and markup Nicholls provides. The markup changes include adding conditional comments and some other XHTML tags within the varying layers. Incorporating the CSS might be more difficult, although you could take the stylesheet provided and apply the visual attributes from your current code.
Beyond that, I don't know how to tell you what to modify. I can't find any more detailed tutorials on this specific technique. However, if you're worried about being able to modify/incorporate the code provided, you might look for a tutorial on the HTC method, which is well documented.