PS3 Tutorial - Install (or update) ANY PS3 with HEN 4.87 - Go from 4.86 hen to 4.87 - YouTube
PS3 - 4.87.1 PS3 HFW (Hybrid Firmware) - HFW is helpful for installing PS3HEN on 4.84/4.85/4.86/4.87 FW | Page 51 | PSX-Place
PlayStation 3: Sony releases Firmware 4.87 for their 14 year old console - HFW 4.87.1 is already out with SEN Enabler already being updated to spoof FW 4.87 - Wololo.net
install HEN on PS3 4.87 or Lower and install Multiman - YouTube