Hi all,
I'm trying to write a small signup system for a community website. Signup in terms of event signup,
rather then subscription to a node. I aware of the existence of the signup module for the event module,
but I'm wondering if it is possible to realize the same functionality with CCK.

My plan is to use the nodefamily/usernode to associate to each user a number of "interest" nodes.
this nodes are basically an association of the user with a trip/event. This is easy. Now I'd like to
add a link "I'm interested" in the trip/event page to register the user interest to a given event.

This link ideally will just go to /node/add/interest page to create the interest node. How can I pass
the id of the event node to this form ?

My idea is to use the CCK computer field, so on the trip page I can generate a custom link with the node id,
so to have a link like /node/add/interest/$node-id . Ok, now the problem.

How can I use this $node-id to pre-fill a node reference CCK field in the /node/add/interest form.

Is there anyway of doing this ?

thanks :)