First of all i want to know what version of notepad is best for coding.

Also do any of you know the name of the plug-in or add-on for firefox that lets you do css on half of the screen, while the other half of the screen is the site you are coding.
for example in the second video, this guy uses that add-on:
http://nettuts.com/videos/screencast...dice-that-psd/