problem with lcd display

After fiddling around with the LiquidCrystal library, I finally got my LCD display to work (I had to change some code in the LiquidCrystal.cpp file). Great job with that by the way, I think the problems were my fault. I do have one problem though. It seems like I can't get the display to show more than 8 digits. I don't know if this is something to do with the fact the are 8 data buses, but I got the lcd off a kit that could use the entire screen. This maks me think that I've done something wrong or there's a feature I'm overlooking. I'd be really grateful if someone could help. Thanks a lot,
Macmaniac