I have a friend who works at a used book store that deals in comics, and a recent collection they bought included two loose sheets of the above stickers, sans the books they would have come with—one of the two editions of 1994's Superman: The Man of Steel #30. The gimmick was that the issue had a "do-it-yourself" cover.
It was basically just a familiar background scene in Metropolis—
—upon which you could arrange Superman and Lobo however you saw fit.
As that strange decade's cover enhancements went, you gotta respect the creativity of this particular one.
I think I like the image of the untouched sheet of stickers as it is more than I'd like any arrangement of those stickers upon the cover, though. There's something oddly appealing about those Superman and Lobo heads and torsos floating around in white space, surrounded by multiple versions of their limbs.
Unfortunately, DC neglected to include a sticker of Superman's old haircut, so no matter how you arranged the scene, Superman had to have his mullet.