I will provide a list of file names, in a ASCII text file, or in a MySQL Table export.
They will look like this:
r0014257
Your php script will contain a loop that will build a url like this:
<[login to view URL]>
the URL is the same every time, except for the file name.
For each file name, download the image assocated with the URL, to the directory where your script is running. Simple....
here is another example URL
<[login to view URL]>
filename is? r0011216 for this url