Hi Guys, tks for the input.
Ok, I will knock up a rough users guide and post it on the site, I'll post here again when it's ready.
Also I am modding the code so that whilst you are reading one page the next is being pre-rendered in memory. Then, when you turn the page it will only take as long to appear as the processor and OS take to display an image
ZuluReader already has "Color Schemes" for different reading conditions. Maybe you need to download the update.