cydwhitYou want to run like two 2x4's perpendicular to the box, like the racks on your car would run. Tie a rope to each end of the 2x4's and then put pulleys (or even little eye hook screws) on the roof of your garage the same distance apart as the ropes on the end of the 2x4's. Thread the ropes and throw a cleat on the wall to tie it off and you are set. Sorry if that doesn't make much sense, I am having a hard time describing it without drawing it.
That sorta makes sense. I'm having a hard time visualizing the pullies vs. the ropes you have tied to the 2x4s.
Also, OP. I'm getting a box because in the summer, it's great for your firewood if you're going camping.