How do you create working key-pads?

[scallenger]

you know, like the one in the trescom level at that lab place, where you punch in the numbers to open a door? how do you make one with a differnt code?

[Rebel]

The numpads work off sequence triggers; located beneath terrain by numpad (in TC). The upper seven digits refer to the code used in-game. The other two associated triggers refer to either a good or bad code entry --