AP: Info regarding Payee Control

Hi All,

Need some info on Payee Control functionality in AP:

1) Is there a KM doc which explains the Payee Control process in detail? I got this document but it is hard to make sense of it w/o screenshots etc: http://docs.oracle.com/cd/E13781_01/jded/acrobat/e190AAP-B0908.pdf

2) As part of 1) above, I am especially keen to see the workflow where changes made to supplier master goes for approval - transaction and setup part of it.

3) Lastly, is there a report for the changes made as part of Payee Control process?

Thank you.