htaccess - GIF to a PHP file

I made a PHP script that dynamically adds text to an image and displays it as a GIF. When you go to the url of the PHP file, it looks good. I can even link it in an <img src>.

My problem is that myspace filters out "php" and wont allow me to put this image on my profile.

I thought htaccess would be the best bet.
I dropped this into the .htaccess file of that directory:

Options +Indexes
Options +FollowSymlinks
RewriteEngine on
RewriteBase /
RewriteRule ^banner.gif$ banner.php

Code (markup):

Its not showing an image when I go to banner.gif. I am getting a file not found instead.

Any suggestions?

 

fixed it by adding this:
[R=301,L]


thanks anyways