Move these files into the /bios directory of your emulator.
There are two primary methods to legally acquire the BIOS files for your emulator: Extract Your Own PS2 & PS1 BIOS (No Console Required!) all ps2 bios files including the new scph90006 link
(v1.00) – The original launch firmware. It has lower compatibility with newer emulation patches. Move these files into the /bios directory of your emulator