I love the way PC games are packaged now, in DVD-style cases, but I don't like how multiple disks are stacked on top of each other. It makes it hard for me to grab the top disk without grabbing the whole stack along with it.
I also have a large number of empty CD/DVD cake boxes, filler disks, and foam spacers. I didn't ever throw them away in case I think of something to use them for.
Step 1: Eureka!
I got some of the spacers out and sorted them by thickness and experimented with a two-CD game in a DVD-style case.
The really thick gray ones were too thick. The really thin white ones were okay, but a little too thin. The cheap closed cell, low density foam ones were just right, as well as the nicer closed cell, high density white ones.
Now on to the games with more than two disks.