Custom refer a friend script

I would like a refer a friend script that does something a little extra. ## Deliverables The script must be able to work on a apache webserver. I must be able to customize how may people to refer. I must be able to customize the message to be sent to the refered name and email address. I must be able to customize the thankyou page for the person referring. The script must not refer the page the person is on ## Platform linix apache