I had two goals with this, one don't solder and two make it like post over on gizmodo showing a 9V Lantern.
I had recieved a few emails about making things without soldering, I guess to some thats intimidating. So here I skipped that complicated soldering process...
Step 1: Parts
9v battery snap connector
Step 2: Wiring
So wire your light bulb mount up, I just stripped the ends of the wire and twisted them around the posts. Remember I am trying not to solder here...
Step 3: Glue
put some hot glue on the bottom of the bulb base/socket/thingamajig and glue it to the bottom of the film canister.
Step 4: Cut Out
cut out the inner ring of the film canister lid, this should be big enough to fit the top of the battery in snugly.
Step 5: Put It Together
So drop the top on, run the 9v battery snap connector through and bask in the glory of the lantern like ambiance.