Finally had some time to build another custom Twenty Ten background and header set! This one is a black and white with a floral design. I also included a starter PSD. So if you have Photoshop you can play around and build your self a design.
Click on each image to view the full size.
Login to WordPress admin. Under appearance click background.
Upload the background and under display settings apply these settings.
Repeat: No Repeat
About the starter PSD.
Make sure your design is under the light blue color. That represents the WordPress blog wrapper.
After you are done with your design just hide that light blue layer and save your background.
(Right click and save as) Twenty Ten Starter PSD
Feel free to try this out!