Any new/additional vista user account pictures?

I recently bought a new system with Windows Vista. As this is new operating system for me i have a small question regarding its customizations. While creating User account i came to know that there are limited set of 12 Vista user account pictures to choose from. I wanted to know if there is any way i can use additional ones. I would also like to know if there is any restrictions on picture size or can i make myself to use?

Thanks for your helps.

Just like Windows XP, on the User Account Picture Window, you have the Browse button in windows vista as well. You can select any picture from there. Infact you can select to use any BMP, DIB, RLE, GIF, JPG, or PNG image file for your display picture.