On PS4, we owe it to Cfwprophet who published Free PS2 Pub Gen in its first version. This is an application that will allow you under firmware 4.05 to enjoy your PS2 games.
To run the application needs make_fself.py, obis-pub-cmd-ps2.exe and aithinfo_emu.txt.
Add your ISO PS2, and you can create your PKG with Fake PKG Generator.
DOWNLOAD : free-ps2-pub-gen.rar
PS3 side, it is the developer Kozarovv who offers us a modified version of ps2_netemu cut for CFW 4.81 and CFW 4.82 through PS2 Netemu Selector.
DOWNLOAD : PS2_Netemu-Selector