[dgreen]

I ended up running a php script that went through the directory and wrote to a file each image ending in uppercase letters.
I then took the list and imported it into a database and through a few queries, generated product codes from the image names (image 123.JPG has a product code of CR00123).
I used the import products from the admin site (using the fields productcode and thumbnail) to stick the new image names into the database.
I am not sure if I am too clear, but it worked and was not that complicated.
Thank you for your help