Getting more keys via a mini USB keyboard?

[WillNeedsHelpFast]

(Gotta get ALL of the keys)

So I need to find a way to get a spare few keys for extra keybinds. Now, this is meant for my laptop and I figure the easiest way would be to just a USB based mini keypad sort of thing. Like this basically:

http://www.amazon.com/Cubeternet-Portable-Numeric-KeyPad-Keyboard/dp/B002XNJGRA

Something I can set up so when I need the extra keys, it's a small hand-move away. But now here's my concern. My laptop already has a numeric keypad built in that I use. If I were to buy one of these and set them up, would the USB keypad and the built in one occupy the same set of keys? If I hit numpad 1 on my built in keypad and numpad 1 on the USB one, will they both be the same thing. What if built-in numpad 1 automatically enters a text string in for me, will the USB version do the same thing?

I need to find a solution for extra keys that I can configure using autohotkey so that they are different. I'm aware this isn't the autohotkey forums, so I was wondering more of the technical side while I research autohotkey abilities.

[Geek-9pm]

For General Reference:
http://en.wikipedia.org/wiki/AutoHotkey

Programs like Autopilot key do not identify exasperate keyboards.  Windows merges the two keyboards.
How many keys to you need? 
I use a commercial program the is different from Auto Hot key
 I use one keyboard and can have over two hundred different macros. I do that by moving up to two and three  stroke hot keys.
Example: I hit control 1 and a menu of 26 items  pops up. I select a macro with letter.  But if I hit control 2 I get a different set.
For single stroke macros, there are a number of choices. Using control with a F key gives you about 10  items.

As you your question, No, programs like Auto Hot key lets Windows handle dual keyboards. Unless you wish to write a low-level drive that has to be written for that keyboard.
AutoHotKey is Open Source. So you could try to modify it.

[patio]

How can you run out of hotkeys and want to add a supplemental keyboard ? ?...which BTW won't work because it will just replace your current NumPad...

[WillNeedsHelpFast]

@Geek - Interesting. I might have to just try to find set ups with modifiers and try to get as many keys as I can.

@Patio - On top of the games fundamental keys that I need, I need around 6-8 for teamspeak and another ~20 for additional ability binds. Most of which have to be easy to access as I'll have to be quick to hit some of them usually.

That's why I was looking into an external solution because having something like that pad set up, I could take my hand of my mouse for a second to hit an important key and bring my hand back quickly.

I'll just have to set up a spreadsheet with my keys and prioritize the important ones and set up a system with modifiers.