I have a question (actually 2, but the first is more important).

I use content profile module so the anonymous user can register some more info.
I've made the textfields and select boxes in CCK and it works pretty well.

Is it possible, programmatically, to change 2 select boxes in the user registration form, and make 1 select box out of them. Thereafter get the result, for example seperated by ":" sign in the value option, and then put the results on its right cck position.
Can anyone help me with an example?

Does the user_registration module has to be hacked, or can one write a custom module for that, and how would I fetch the $form['cck_field'] in a custom module??

Seb.