Hey just wanted to share my coldboot I have made for the PS3.
If you have a 3.55 CFW on your PS3, all you need is this app to
flash the 3 files (coldboot.raf, coldboot_multi.ac3, and coldboot_stereo.ac3) to your PS3.
Screenshot
Download Hax5 PS3 Coldboot
I hope to get a video of it in action up soon. You can find a my coldboots for the PS3 here