The Agile Web D. with Rails book (a must have!!!) has an
parent child parameter driven forms in Chapter 10 (shipping), in the
of its example Depot application.
It so happens I have a tutorial with screenshots on using the Depot demo
with RadRails, and I just finished going through that chapter this
(believe it or not).
Check it out at
That may help you.
From: Fernando R. firstname.lastname@example.org