.htaccess change referrer

This is my current code:

RewriteEngine On
RewriteRule 1.jpg [mydomain.com...] [R,L]
RewriteRule 2.jpg [mydomain.com...] [R,L]

I understand this code and what it does, but what I cant figure out is how to change the referrer from [thereferrer.com...] to [myotherdomain.com...]

I read somewhere that I would need to use meta refresh to wipe the referrer, but then how would I replace it?

I have looked through this forum and noticed a lot of you are very informed with .htaccess so thought you may have an answer for me.

Thank you for taking the time to read this (and hopefully reply ;))

Tony

Changing a referrer