How To Automate the Simple Tag / Auto Tag Plugin

Hi,
I am using this plugin : http://wordpress.org/extend/plugins/simple-tags/

What I use it to automatically tag all my posts, it is very usefull especially when i want to add new tags and apply them to all (matching) previous post on my blog…

Anyhow, I find myself clicking on the “auto tag all content” button very often, and was wondering if there was a way to make this action automated.

Once per X time the auto tag would go through all the post and add new tags if necessary.

Thanks,