having trouble with neogeo psp can't load any roms

I'm running a 1.5, trying to load metal slug and got nothing. It tells me bios not found. So I downloaded several bios files. First off, the readme instructions are garbled text, but i did get some instruction on where the files go in the psp. I don't know what bio file mslug or any other game it requires. I know which Bios go in the rom folder along with the other roms (zipped or unzipped)?(2.0,1.0,2.1,etc). Anyways, this is the message i get trying to run the game off the emulator:
ROMSET mslug
Loading: "Europe MVS (Ver.2)"
ERROR: CRC32 NOT CORRECT."Europe MVS (Ver.2)"
Press any button

BIOS Not Found

Can anyone help me step by step on what i'm missing and what i need to do. Neogeo is supposed to be the best of best of emulators. I would greatly appreciate, this forum has helped me out tremendously. Thank you.;)