Hello!
I have to ask the developers of OPNPS2LD about the changes of the USB handling. The last working version is the r1073 one. Actually, I'm using the Maximus32's build available here:
https://github.com/rickgaiser/Open-PS2-Loader/releases
However, any version newer than that (the earliest I could find is r1079) doesn't work. Well, the program is able to load the list of USB games, but is not able to load the game itself. I've turned on the debug colours in settings and here is the colour sequence (with disabled IGR!!):
Pink -> Green (longer time on that one) -> Dark pink (magenta?) -> Golden.
WRC: Rally Evolved hangs on the last one, ICO shifts to black and hangs as well.
The colour sequence is the same as the one in the working build r1073.
I'm testing now r1179 version, but the symptoms are no different in any builds after the r1073 (I've tested 1079, 1081, 1094, 1096, 1108, 1140, 1174, 1180 and more).
My console model is the SCPH-77004. No cheats enabled or whatever. OPL loaded by coldbooted uLE 4.42
I'm looking forward to your response!

Greetings to all developers really involved in OPL and PS2 development.