Ok here's and idea to help you... make your templates with the pics and thumbs names pic1.jpg - pic20.jpg or whatever amout of pics you use add your tgp reps to the pages. Now once you have all your diffrent templates for your pages like 1a.html - 1z.html just make a new batch of pics pic1.jpg - pics20.jpg and run your old template thru an auto renaming program and upload the renamed templates day1a.html - day2.html and the new batch of pics and templates. Sounds like alot of work but trust me it would go pretty fast if you have your pics made into groups on you harddrive you just have to rename the templates every day and upload the new group of pics and submit.
Hope this give you another idea
Regards,
XTC