GT5 (US) works fine, It's better to use Hermes payload and not PL3.
PL3 with the 3.50 spoof for me is buggy (pressing PS button crashes the PS3 instantly on the intro video) and the top gear test track crashed while installing.
Using hermes I could not boot the game without first deleting the game data (it came up on screen that the game needed at least 32MB free when i had 34GB free).
Deleting and recreating the install data with hermes payload fixed that and can now play the licenses without crashing.
The EUR version does not work at all with the patched US eboot. All we need now is a patched 1.05 eboot...