It took some doing, but this fix seems to have worked. Granted, I've only just turned the system back on and started an update, but that's a heck of a lot better than the yellow light I was getting before. I used the kit, and while peeling off the plastic-y paper backing from the thermal pads was a nuisance, everything I needed was included, and I didn't have any trouble following the instructions in this guide through to get the ol' PS3 up and running again. Thanks, ifixit!