Hi iluvledz - There are several ways to add pics to an active listing, some are free and one is not. If you simply go to ebay's 'revise your listing' page and add pics via ebay's 'add photos section', located above the description box, then ebay will charge 0.15 per pic for this.
If you go to Auctiva's 'active listings' page, and click the 'add image' button, then you can select from your saved pics and the photos will be added below your description in your active listing, with a note that the images have been added. No charge for this method (I think). The reason I don't like this method is the pics are an obvious 'add-on'(not too professional looking).
The method I prefer is to revise your saved listing in Auctiva, and then copy & paste the HTML from the revised listing into the description box of your active listing. No extra charge for this either. Here are the steps:
1) Locate your listing in your Saved Listings folder in Auctiva, open it, make any necessary changes (add the new photos), preview, and save.
2) On your Saved Listings page, click the <HTML> icon to the right of your listing.
3) Select all of the HTML in the popup window and copy it.
4) Locate the item on eBay and click the "Revise your item" link.
5) Click the "HTML" tab above the Description box.
6) Select all of the HTML that's there, paste the copied HTML in its place, and save your changes.
Keep in mind that you can only change your listing if there are no bids and more than 12 hours left on the auction.
Hope this helps.