Custom MODx Evolution installer

I know this is possible from speaking to Ryan, but I haven’t figured out how to do it...

I use a number of extra snippets/plugins/TVs on all MODx sites I build. Rather than adding them separately, it would be great to have an installer that added them all, saving me time setting up every site.

One approach is to keep a local ’enhanced MODx’ version as a template, installed, with a database set up, and when depoying a new site copy the folder + database to a new location. That would work, but means the addons are always installed, the DB settings have to be edited by hand, and I have to remember the asset paths in the configuration changed.

This is the approach I’m using at the moment, but I understand the MODx installer can take care of installing more addons than those bundled with it. The question is: how?