1. Use Select color range command to select the color you want to keep.
2. Inverse Selection
3. Add A Hue Saturation adjustment layer
5. Touchup layer mask as needed.
Richard M. Harrington, PMP
Author: Photoshop CS for Nonlinear Editors
Co-Author Final Cut Pro on the Spot, After Effects on the Spot, Broadcast Graphics on the Spot, and After Effects @ Work
Check out the new DVD: Photoshop CS: Essentials for Digital Video from http://www.photoshopforvideo.com