How to save the module =numwords?

[Rizwan Sharief]

Hi, 

I tried this method from your group http://lostinexcel.blogspot.com/2012/01/how-to-convert-number-into-words-in-ms.html#.UjrhD9KD9ic and it worked really really well.

but could you tell me how to save it so that i can use this module in all my excel sheets...

Thanks in advance to everyone.

Rizwna