The only other emulators that don't require a BIOS is the HLE version of AdriPSX and VGS/Bleem, but they are way outdated.
Here's a good thread with BIOS info. Use your intuition
Anyway, I strongly suggest using a different emulator. PCSX is good (and I use it for some games) but other emulators have been through more development and are more refined, especially ePSXe, PSXeven, and pSX.
On a side note, it's '
BIOS' not 'BIOs'. A very minor thing, I just had to point it out
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Dedicated to mediocrity and repetition since 1994.