Applications :: Using Adobe Bridge Alternative Photo Organizer

I'm a photographer and I have tens of thousands of photographs. The way I classify them is the following:

Each shoot has its separate folder, and within that are two folders: Originals and Retouched. Every photograph I consider finished is retouched in Photoshop, and therefore has a modified version in the Retouched folder.

The reason this is important to say is because Aperture does not allow me to do this. Aperture insist on having one version of each image, and it replaces every original with its retouched version, and hides the original.