This is a softmmod.
You can do this by booting up multiman and selecting a PS2 ISO
Some games don't run very well (or at all)
There's a compatability list you can refer to here https://www.psdevwiki.com/ps3/PS2_Classics_Emulator_Compatibility_List
That's why I don't get too involved in the forums I don't want my name all over the damn place but I do feel like I had a doing in the Leo and Luke love battle lol