I absolutely agree what you say.
I think you can get your goal by a common js script able to make “tabs” via shortcode.
The first tab script I found is here:
http://michaelwender.com/blog/2010/11/01/creating-wordpress-shortcodes-for-jquery-tools-tabs/
Put tabs shortcode around each snippet of form fields you have.
I hope this may help.
Good luck and … sorry for my bad English, I’m Italian.
Alfredo
