In a reply to an earlierpost I refered to a diff file being available. A diff file is a file that can be applied against a file you have to update you. This is useful when you are updating scripts. Sadly diff file are not for the novice, or that matter, windows.
So make your own.
http://www.pspad.com/
PsPad is a nice free text editor. Lots of bells and whistles.
anyway...expand,explode,unzip, whatever the upgrade to a folder. Open your original file, right click and use the "text diff with this file" choice. You get dual pane with the diff's highlighted and can make a file with the diffs.
This is nice for when you need to update a script you have customized. Saves a lot of rework.