How to Save UV for Editing in Photoshop

http://img214.imageshack.us/img214/817/uvimage.jpg

I have unwrapped a cube in Blender 2.5. Now I want to save the UV map as a .tif file but the background is black and I need to know how to change it to white. I have followed tutorials but in every tutorial they import an image to map on the UV and that’s not what I want to do. I want to export the map for use in Photoshop.

Does anyone know of a tutorial or can someone help me with the steps I need to create a white background and save the UV map as a file I can use in Photoshop?

pg

http://blenderartists.org/forum/showthread.php?t=179784