Would I "poll" them one by one or would it be all at once? And why would I want to store them up like that anyway?

Also, whats a 'dallas 1 wire bridge'?

And in the manual it states

"2.2.1 Advanced General Purpose Outputs & GPO's 1 to 4

These outputs are capable of controlling high current draw ...

In the manual it says "use of upto a 24 keypad with a 10 key buffer" - whats a 10 key buffer?

In some mod pictures I've seen, people appear to have hooked up their own switches and buttons - is it possible that I could construct an array of buttons in my own design in place of the 4x4 keypad? And if so, would a minimum number of buttons be required?

I understand that I must buy the display, the keypad and the LCDC software. Is there anything else I need like cables or interface/controller cards or whatever?

Sorry, this is the one I meant to say I wanted;
http://www.matrixorbital.com/pages/product_view.asp?CatID=1&ProductID=106

It's got a similar code to the manual you gave me.

Unfortunately I can't program - I was hoping I could set it up with the software supplied. I kinda wanted to put this into ...

http://www.matrixorbital.com/pages/product_view.asp?CatID=1&ProductID=80 The one I want....

I was thinking of doing my first proper case mod (beyond sticking an LED fan in my case) and was wondering if it would be possible to type in whatever I want the screen to display so that it would scroll ...