About Guided Procedures

Hi Gurus

Can anybody please give me brief idea about what is Guided Procedures(GP) and how it works?

What can be done by using GP in portal, and few activities that can be done by it..

I am confusing with the terms CAF whenever GP is coming into picture. How CAF is related to GP? Does GP works without CAF?

Can anybody answer for my queries....

Points will be awarded.........

Regards

Sireesha.