First, you should only put QR wheels in frames with suitable dropouts. They should at least be vertical and hopefully have little bump thingy's that won't let the wheell fall out if it gets a little loose. This is really important.
Then I suppose if you could find a QR axle with just about the same diameter as your solid axle, you could install it into your wheel. Someone with bike parts might have old wheels and stuff. Ideally if you can find a QR axle with exactly the same thread as the solid axle than it should be easy to just swap all the old parts and peices onto the new axle.
http://www.sheldonbrown.com/harris/axles.html
If you find an axle that is close to the same diameter, but threadded differently, you could possibly put something together in order to make it work. The axle cones would have to be acceptable for use with the wheel races and whatever bearings you would use. Also you have to use nuts and spacers and such to end up with the right amount of QR axle exposed on the ends so as to be strong. The wheel should end up centered in the frame of course.
You'll need a skewer and cone wrenches:
http://www.nashbar.com/bikes//Produc...0052_175325_-1___
http://www.performancebike.com/bikes...551_1030392_-1___
Also, you should also probably post things like this in the Mechanics forum.