Have you checked out Altered Arts e-zine and club site? I have found some pretty cool ideas and kits from them :) Long ago I made a pin and atc for the magazine and since have become a fan. Now, I am making things for their new dt! Here is a Vintage photo assemblage I made using a jewelry box bottom , some ephemera and a cut out vintage photo. The box is spray painted black and the images were popped up with dimentionals. I covered it with a square piece of glass that was adhered with clear bathroom caulking. Fun!
Below... I made this Vintage box at my art group. This one was done using an old cabinet card picture frame. You take the front off of the frame (carefully) and adhere to a box (painted or not) that has an opening slightly bigger then the frame. Again...various ephemera inside and buttons on the outside.
You can also if you wish, adhere the box BACK on to the back of the cabinet card frame you took the opening from so that it will stand up like a cabinet card picture frame would. :)