webmin mods..

oh... has anyone ever played/used/modified the webmin app?? i'm looking for a web based app/tool that i can modify to be able to manage my distribbuted client/server crawler on my network of boxes. i'd rather start with an existing framework/app that already kind of works with modules/apps on a system, and then modify it to meet my needs... i'm ultimately looking for a php based web app that i can modify to allow me to schedule running my crawler... along with a huge number of additional functions.. thanks