a very nice tutorials along with the vedios are given on this site go for the links i had given below.. and if you want know about any of the component used in the CIRCUIT just click on the component tab on that page itself
http://www.engineersgarage.com/microcontroller/8051projects/interface-lcd-at89c51
http://www.engineersgarage.com/microcontroller/8051projects/display-text-LCD-AT89C51
http://www.engineersgarage.com/microcontroller/8051projects/create-text-animation-LCD-AT89C51
http://www.engineersgarage.com/microcontroller/8051projects/create-custom-characters-LCD-AT89C51
http://www.engineersgarage.com/microcontroller/8051projects/hindi-alphabets-LCD-AT89C51