How to install scripts
Just a followup to the previous post linking to those scripts – here’s where to install them:
That’s Applications -> Adobe Illustrator CS4 (or CS5) -> Presets -> en_US -> Scripts
For CS3, it’s similar – Just Adobe Illustrator CS3 -> Presets -> Scripts
Just drop them all in there (or leave them in their own folder) and restart Illustrator. You can access these scripts from File -> Scripts -> script name