Does anyone know to create a project gallery inside a project gallery page. Needs coding.

Hi! Does anyone know how to create a project gallery inside a project gallery page. I want to use portfolio 3 in the Brine template, love the hover effect, and then i want one projec to link to a page with clickable thumbnails (with text on the thumbnail) in masonry style that links to a project page. See attached screendump.

I discussed this with the Squarespace support and they say it's not possible without coding and they don't provide that help. I'm willing to hire a designer to code/build it for me. Just need it done...HELP!!