Automatically connect to network upon wifi

I've searched high and wide and have yet to find an easy and free solution. I just want something to run in the background so that when I connect to my home wifi, it automatically connects to my network drive. Is there a script that can run in the background?

Are you needing help in mapping the drive every time you turn on the Mac?

What version of Mac OS X are you running?

nope, trying to map a drive every time i log onto my network (i'm on a macbook). So when I leave my network, i lose the drive. I want it to automatically reconnect when i'm back home.... running leopard 10.6.7...

Have you tried creating an alias of the network drive? (I believe that's possible).

I tried the alias... that doesn't work. but i want it to be more automatic--in other words, it just connects without me having to go and connect manually or double click on an alias.