566332 WordPress Customization Required

I need customization done to one site...it has images in gallery style, that go four across, I would like to make the pages for "X" to have 4 across by 4 down...so 16 images per page...and then visitors would click the next page to view the next set of 16 images...I have attached an image (rough) to create the visual...the site has already been customized and the right person would have to work with it and modify page layouts...it is not an option for this theme. I will be honest I have spent WAY to much money on trying to get this site done, so budget is not huge. But may result in other works. Please PM me for site details and all questions...I will be responding as quick as possible as I want to get this done ASAP thanks