There have been a flurry of postings on LCDs recently. Here are some links that I came across recently in Elektor. ( I have not checked out myself - I currently dont have problems with LCD's !!)

www.semiconductor.hitachi.com/hd44780.pdf

www.lampex.com/prod.htm

www.beyondlogic.org/parlcd/parlcd/htm

www.overclockers.com.au/techstuff/a_diy_lcd

www.myke.com/lcd.htm

Hope that helps

Raghu