In Drupal CCK it is possible to set the Number of Values to 'Unlimited,' so that the user can click 'Add Another' and a new field will pop up.
Is this somehow possible with a group of CCK fields as well? I need to have a textbox and dropdown linked together, and have my users be able to add an unlimited amount to the content-type. I've seen threads about people working on their own implementation, but have yet to see anything be released on this topic.
http://drupal.org/project/flexifield Also see there some links to other modules like this.
There is a way to do this with the CCK 3.x experimental development version. This isn't really recommended, but for more information on the state of multigroup in CCK, check this post out: http://drupal.org/node/494100.
A more recommended alternative for now would be to roll your own compound field module specifically for your needs. I have had success in doing this and got the idea and inspiration from this article: http://www.poplarware.com/articles/cck_field_module.