batch convert - change transparent color to solid color

I need to take a batch of transparent images (can be GIF or PNG), and convert the transparent color to a solid color (I'll probably use RGB(225,150,75)). I need to leave the white areas of the image white! Acceptable input formats: .gif OR .png Acceptable output formats: .gif OR .png OR .bmp Sample origional file: [login to view URL] Sample new file: [login to view URL] NOTES: The source files are all greyscale images. My new solid color can be ANY color that is NOT a shade of gray. **I am in a hurry for this... I'll probably approve the first bid I get...** ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform MS windows 95 or later OR MS-DOS ## Deadline information **I am in a hurry for this... I'll probably approve the first bid I get...**