increasing contrast

how do i go about increasing a finished products contrast without losing its color values? you know, i don't want it to look completely faded. is there any way around this?

It is going to be difficult being that the image is already a finished product, but you can try using "Levels" and possible do some color adjustment using added layers and blending modes.

Also check some of the photo retouching areas, there might be some usefull information on those sites.

Maybe post the image, if you want, maybe that will give us a better idea as to what you are trying to accomplish. ;)