multiple select profile fields in 5.x

Hi -

Anyone have any ideas on how to implement multi-select profile fields in 5.x? For example, something like "What are your areas of interest, please check all that apply?". I found some patches that apply to earlier versions of Drupal (E.g., http://drupal.org/node/33044), but not to 5.0. Or are there other approaches to get the same functionality other than using the profile module? The key for my project is to make the data search-able.

Thanks, Lev