Need help to be able to put my signatures in pdf files using Acrobat or CS

[Ghareeb_Da_Baal]

Ok so I have to sign these pdf file relating to my work. . It gets annoying as I have to print the pages & then scan them or fax them to myself.

I do have Acrobat 8 Pro and Adobe CS 9 did not really use CS ever)
How can i save my scanned signature with transparent background
and then simply insert in pdf file using CS or acrobat?

Thanks!............