Yeah, I have three hard-drives in my computer, and only four 3.5" bays. So, they were all right next to each other and making a lot of heat, so I relocated my 200GB SATA drive to a 5.25" bay.
I got my dad to bring me home about two feet of 1/4" plastic rod. I cut four pieces off that were roughly 3/4" long. Then I drilled the centers out so my screws would go through the center. The plastic pieces are for spacers, so it doesn't put stress on my 5.25" bays when I tighten the screws, it's all solid.
It dropped the temp on the SATA drive about 2*C or so. Now I need one of those covers with the 40mm fans on them (or, make one
If anyone ever gets this ambitious, the screws were 6mm.