ahh so ok on the optimizing images note, I found the option in my image editing program for .png it's "Posterize" here is a nifty bit of info too -
http://www.smashingmagazine.com/2009...on-techniques/
How were you going to optimize the images Ozzy? I've only ever thought to optimize .jpg and .gif honestly using default options available not "posterize" so some of this is a little new to me.