I took a look at a few of your auctions and it appears that you uploaded the images through eBay's Picture slots and did not insert any of the images inside your actual description area with HTML.
If that is the case with all your listings, then you are in the "do nothing category". All of your images currently used in your auctions will automatically convert to eBay Picture Hosting, so you will NOT have to do any revising.
Yes, it is true that per-listing eBay picture uploads and upgrade features (including Picture Pack) are FREE for Premium and Anchor Store subscribers for listings on the US, CA, and FRCA sites, excluding listings in Motors vehicle categories.