I am working with DNN 6.7. My site owner wants some custom fields added to the Profile screen. They want a list of pre-defined "areas of interest" but they want the user to be able to pick as many as applies to them. I cannot figure out how to do this. It would be very clunky to have to create a check box for each and every item in the list. Can anyone offer any suggestions. I have spent quite a bit of time looking through the DNN store and the only module I found that "might" work (I don't even know for sure) is way out of the owner's budget since they have multiple portals within an instance. I have searched through forums on how to customize the form but nobody seems to address this particular issue. Is there somewhere I can change the field type on the back end?

You should try Dynamic Registration by Data Springs.