If you want the Auctions to have the pictures inserted in them just like your saved listing would show them (rather than appended to the end) then you'll basically have to folow these steps...
1. Make the listing like you want it then SAVE it.
2. Go to the Saved Listings tab.
3. Select the listing in question.
4. Pick the GET HTML button.
5. When the Pop-up window appears copy all the text in that window.
6. Logon to eBay and Revise your item.
7. Replace the existing HTML description with the text you've just copied.*
8. Save the Revised Listing.
*Note...if you are a user of the Store Window then you will have to get the Store Window HTML and paste that in also before you save the listing.
Also, if your item has a bid on it already then you will not be able to do this...you will only be able to append to the description, you will not be able to replace the description.
This question has been asked and answered several times...so if the instructions are not perfectly clear then do a search and you should find a post with a more elaboratly detailed set.
Mike