Oi,
since i wasn't satisfied with the state of the HLE bios in PCSX rearmed, i made some of improvements to it
as to greatly increase compatibility with games over the HLE bios.
You can read more about the Pull request here :
https://github.com/notaz/pcsx_rearmed/pull/137
The short answer is you'll be able to play more PSX games without an official BIOS (with the exception of around 20~30 titles).
I've managed to fix up games like R-types, CTR (both relied on uninitialized memory), fixing saves in most games (including LEGO racers), outright crashing (Blood Omen, GTA2, Burning Road) and so on...
Btw, this benefits everyone using PCSX Rearmed, i expect the libretro fork to merge my patches soon too.
However i couldn't get PCSX Rearmed to work still... it crashes. Bummer.
Hope i can look into it.