mapping external keyboard to internal

[getanshub4u]

I have been using my lenovo r61 thinkpad for three years now.some of its keys dont work anymore and now i'm unable to use them as hotkeys (Fn + home to increase brightness,etc) .
So i recently bought the logitech mk320 wireless kb/mouse combo.
Is there any software/driver/command to map the hotkey shortcuts from my internal keyboard to my external keyboard so that i can use the hotkeys again.

[Biloxi]

Download and install Sharpkeys. This is an tool that can help you to map your keyboard keys to any function you want. The tool provides an easy to use interface which some pre-configured list of keys setting. You can also create your own kind of key combination and set the same for usage. The tool is enough powerful to map all the keys with keys combination of Windows. Another tool than this is alpha omega which is an function key mapper tool.