[support] Automating install

Hi, I am studying drupal (drush/make/features) in order to automate the tasks for installing a drupal site. Ideally I'd like to use like site_create.sh and it would download, install the modules, create the database and activate the modules I define. So far it seems that I can do almost everything with drush, drushmake and feature but I couldn't find info on actually creating the database and activating the modules. Anyone care to share experiences with that (urls, tips etc)?