Hi, 
I've attached a picture that shows how you have to connect a parallel
cabel to a LC-display. Note that the picture of the parallel kabel is a
back view. When you look straight at the pins (at the front), on the upper
left side you have pin 1 and down right pin 25. 
The pinouts are like so : (From lcdtext) 
1.1 Connecting the LCD to a printer port

----------------------------------------- 
LCD printer port 
Pin signal Pin signal 
1 GND 18..25 GND 
2 +5V --- *) 
3 Vadj. --- *) 
4 RS 6 D4 
5 RW 7 D5 
6 EN
8 D6 
11 D4 2 D0 
12 D5 3 D1 
13 D6 4 D2 
14 D7 5 D3 
Getting the supply voltage: 
Use a floppy supply connector, get it from the
game port, take some 
diodes 
and a capacitor and get it from the port's
data lines, get it from the 
keyboard 
connector or whatever you like. Be
save to avoid short circuit. You 
need only 
3mA at 5V! (if you have the
same type lcd) 
Connecting the contrast adjusting pin (Vadj.): 

(variable resistor)

.------. 
Vcc ---| 10k |--- GND 
`---^--' 
/|\ 
| 
Vadj. 
You have to ask for a 10K trimmer (=variable resistor). With this you can
change the voltage between 0 (maximum contrast) and 5V (no contrast al all) 
I hope this will get you on the way. 
Michel