I would like to offer my client the option of a form to upload stock to the database with 4 images.

I have found plenty of scripts to do this, but the other part I need is for my client to be able to go back to that stock item and if needed change all of the images, or maybe just one of the four if needed.

Can somebody point me to a good understandable tutorial, or if they maybe have a script to handy to paste back.

The form I currently have is that the form is empty once in the page ready to add stock to the database, and then on the same page they can select an item to edit any part of the stock, and I need to have the option of being able to edit the images, and if one isnt changed it keeps the image that is currently in the database.