Help for Aimeos

I'm trying to create a custom template whose structure is completely different from the defaults, I've created an extension using the online tool and started modifying the templates one by one, which feels pretty tedious, is this the preferred approach?
I plan to have multiple stores, each with a custom template, what would be the best way to have the template determined by the site/shop?

It's the only approach possible if you need to change the HTML structure of the templates and it's the same in other applications. Wordpress themes usually also contains own templates for different content types.

If you want to create several web sites with different layouts (which may require different configuation) and they don't share products, you should set up one Aimeos instance for each web site. If those sites does share a lot of products, it would be possible to make the configuration (and therefore the config for the templates) site specific - theoretically