newbie question: combo box population

Hello. I am a newbie to applescript. I am making a simple application, and want to put some data in a combo box. I am using the following statement:

make new combo box item at end of combo box items of combo box “the combo” with data “my combo option”

this works fine, but I’m trying to bind to a list of items which has two columns: ID and Description. The previous statement lets me print the only a string (the description), but I dont know how to bind the ID as well, so that when I select that option in the combo box I can raise an event and extract the ID.

Thanks a load!

Alejandro.