EDIT: This wasn't too hard once I appreciated the lengths to which I would have to go. Basically I copied the code from the layer of the theme I was using (Blue Fence) to my custom layer, and then copied
function Page::print(), which is a pretty long piece of code from Minimalism. Then I edited some of the code in that function before hitting save and selecting the custom layer. If you'd to check out what I've done and use it yourself, it's Layer #41641891.