For those who asked how I did it, OG Gameboot/coldboot step by step tutorial! (Enjoy!) : r/PS3
Original Coldboot, Gameboot & Startup sound (Pre-release Version Found in Firmware 0.90). Tbh this is better than the current version. | By Malaysia PS3 Jailbreakers | Facebook
PS3 - PS3 Coldboots Collection [PS3 EXTRA - ISO] - by 0_obeWAN | PSX-Place
PS3 classic coldboot | GBAtemp.net - The Independent Video Game Community
Original Coldboot, Gameboot & Startup sound (Pre-release Version Found in Firmware 0.90). Tbh this is better than the current version. | By Malaysia PS3 Jailbreakers | Facebook
TUTO]Créer son propre logo et son de démarrage PS3 (coldboot) : Tutoriaux - PS3-Infos