I want a php installation script for any Joomla (or whatever) site, like fantastico or softaculous.

The issue is, I do not require a standard installation. I wish to then add extensions and then add configurations towards the installation.

How can i find the best base with this?

Thanks

I believe softaculous itself has custom scripts support : http://demo.softaculous.com/index.php?act=customscripts

http://www.softaculous.com/docs/api