Help with key mapping usb keypad

[HairyCornflake]

Hi everyone, I'm in need of some help with key mapping of a little 10-key USB Keypad.

 

For a bit of background, I basically only use my pc for games, so I've been using a 65% kb as I prefer the extra desk space but recently have been wanting a small separate keyboard that I could map to F13, F14 and so on which I could bind to various media functions and things like shadowplay. I bought this cheap little 10-key keypad thinking I could just simply remap and jobs a goodun:

 

https://imgur.com/a/n19Pa7k

 

Unfortunately, the Keypad is mapped to 0,1,2,3 etc instead of num0, num1 etc, so if I remap '1' to 'F13' it also remaps the '1' key on my main board which I don't want as I still want to be able to type numbers. I guess Windows sees them as one singular keyboard?

 

So I guess I need to change what the 'default' key map is for the Keypad, but I don't know how to do this. The board didn't come with any software or additonal info.

 

Please excuse my naivety, any help would be much appreciated.

 

Cheers