Change colour theme of various images for an oscommerce site

Hi, I need a graphics expert! I have an oscommerce template (if you want to see it please PM me). I basically need all the brown color changed to a blue theme. I have various PSD files and the .gif and .bmp files which the new images need to correlate with. In total there are about 20 small images and a big banner which needs the name and slogan changing (as well as the colors). I need a designer who can work quickly (I need this done ASAP) but with creativity. MAX Budget is $20-50. Please PM me for more info. Thanks