How to create a Custom NewDocSet.aspx

Hi,

I have a Content Type that inherits from Document Set and want to use a custom NewDocSet.aspx page.

I've followed the article: http://msdn.microsoft.com/en-us/library/ff512780.aspx and used PowerShell to point my Content Type to use that as its NewFormUrl and it picks up the custom NewDocSet page successfully (I've called mine CustomNewDocSet.aspx and it's located at the root of _Layouts.

But the only thing the CustomNewDocSet.aspx page displays is the Title of the List and the Title of the Content Type which is fairly useless (that is all the above article's code does).

What I'm looking for is a way to customise it further so it automatically shows all of the fields in my Content Type exactly how the out-of-the-box NewDocSet.aspx page does. Basically I want to mimic how the NewDocSet.aspx page works then add some JavaScript to it (which I'll be fine with).

Does anyone have any idea how I can do this?

Thanks