If you only need the missing numpad key "6" try downloading a tiny autohotkey scriptfile : "numpad6.exe"

https://dl.dropbox.com/u/60004089/NumPad6.exe

Double clicking the file remaps the "Appskey" on your keyboard to make it behave like the number 6 on a real numpad.

Test : open notepad and press the appskey.It should give you a "6"

To stop the script from running and restoring the Appskey right click the green "H-icon"  in system tray and click "exit"

If you don't trust the exe-file you have to create your own script - see video below

It should work but I can't test it on my system.