When this NES manual project was first begun there was nothing you could do besides manually type in the text yourself. Nowadays, though, there are many good OCR (optical character recognition) programs you can use to have your computer do all the text readout for you, making manual entry a lot easier.
As a result, if you have a manual to add to this site, please mail it to me as soon as possible. I try my best to collect the manuals released on other NES sites, but if you have one I don't, send it quick so work isn't needlessly duplicated. Thanks!