Firmware 5.00 M33-6 was released in late 2008. This suggests the pack was compiled around that time. Games released after 2008 may not work on this firmware without further patching, as later games required newer firmware versions to launch.
If you’re still on and want a quick, no-fuss game pack, this works as a starter. But for most users, I’d recommend: PSP MEGA-PACK -184 ISO-CSO 73 -Minis-- -5.00m33-6-l UPD