Adium email notification

Hello everyone,
I had successfully googled the solution about a year ago when I started using Adium as my integrated chat client, but can no longer find out how to configure Adium's email notification system.

I have the script that will tell Adium to automatically close the window that tells me I have a new message (so the dialog boxes don't pile up on my desktop). What I don't know and need help with is where to put this script or where to save it on my computer so that it will work again!

Thanks in advance!