Set your UMD driver to the Sony NP9660, as that will give you the highest rate of game compatibility.
Originally Posted by atreyu187
Also, upgrade your version of 6.37 ME to the latest version (It's currently at v5), as I remember some of my games not working on the older versions of 6.37ME.
Do the same thing if you are using 6.35 Custom (Latest version: v17).
I don't think that you should use the external Prome loader, as I think that compatibility with games is worse with that (On 6.37 at least).
Try to use untampered games too.
I assume that you're sure that your games and disk's filesystem are of good integrity?
Unmodified SCPH-77006 with SM 3.6
SCPH-39006 with M-chip modchip, SCPH-10281 NA and refurb Seagate 80GB HDD
SCPH-10000 v1.00 with SCPH-10190 PCMCIA NA and SCPH-20400 HDD unit