Re: What do i do with a pcsx2 bios?

You should be able to go into your config on PCSX2, and then on the drop-down menu that shows up, choose "Plugin/BIOS Selector". Once you select that, click on BIOS and set the file path to the folder which contains your PS2 BIOS. It should then show a list with the BIOS from which the .bin file contains. If you want the USA version, then select USA from the BIOS list.

And the .bin file didn't appear on the bios rom part of the emulator (pcsx2)