I love the look of the old school toy camera. I'm also a big fan of super saturated color, and to get there today I used the vignetting tools in Adobe's CS5 to get the corners adequately darkened and still keep the center light and focused. I didn't opt for the off color registrations you could get by switching up your color chemicals like you could in old school silver based media. Rather I went for the contrasty overly saturated colors and contrast one got from the old Cibachrome print material.
To get this image I opened the RAW file and used the lens correction tool. Instead of minimizing the distortion I went the other direction and maximized the vignetting and upped the barrel distortion some to further the "fish eye" look. Once done I went into the saturation levels and upped the saturation for orange and yellow a bit to make the flames "flamier". Then I hit the ok button and opened the file and continued to work it in the 8 bit mode it was converted to for PSD files.
I used the adjustments to alter the hue and color to compensate for this being shot in the early morning in the shade. Then I made one last attack on the vignetting by going to "filter">"lens correction" and bumped up the vignette to further darken the corners. I did this to put the background elements more into the shadows making the old Flamed Woody the center of attention. Then I upped the center lighting value some to brighten up the car. Once done I flattened it all with the layers tool and converted to a smaller 72dpi jpeg file for publication here.
The real image is much larger and detailed than this compressed jpeg portrays, but you still get a sense of what the printed image is like.