[support] Custom module and multiple image uploads

Hi list, I thought I already sent this to the list but seems it didn't go through. I'm working on a custom module which requires multiple image uploads. I've implemented image uploading in this thread http://drupal.org/node/53621 previously, but multiple images seems to be a mystery. Does anyone know a way to do this, not using another module? Any help would be appreciated. Thanks, Brenda