Hi thanks Klas
I didn't know that about button free.
I'm thinking of making it smoother than that:
I will have in the form, dummy fields relating to other content type ( and storage none )
In beforestore field add code to create new content of content-type 'other' so that the user only sees one page refresh and presses one button.
I will test with group and group-x field to see how that does it.
I will post back with my results
Bucklash