HELP updating listings or auctions with pictures via the CSV

[UKpartsonline]

Once i have uploaded all my pictures and a csv within a zip file, so all those listings are in my shop and on ebid, with pictures.

Can i then use the csv to update my listings and re-upload just the csv
(do i need to change anything, please dont say i have to then go through and change all my pictures from 'MGF-R-026-All foot pedals (1).jpg' to the 'http://ebid.s3.amazonaws.com/upload_big/2/8/0/1403483556-20086-175.jpg' web address)

What i would like to be able to do is just change what i want changed in the listing and reupload ONLY the csv without changing all the pictures from file names to web addresses and have the listings still have all the same photos on.

[billsstamps]

When your pictures are uploaded they have an Ebid location.

1. Go to your listings, locate Export Listings top left and download your csv spreadsheet with Ebid locations for pics.
2. Then do your update,
3. change a (add) to o (overwrite) in the appropriate column of the spreadsheet.
4. Upload the csv in bulk upload.