But on a serious note, if it doesn't have holes for screws and doesn't list any accessory bracket you can buy for it, you're stuck with the push pins. Usually they hold very well once you get the pins the snap in. It's the snapping in that is the annoying part.
Meh.... probably should have, but its just for the folding rig. I'm not overclocking, just need a better heatsink and fan for in the case, for cheap is good.