Lmao if you expect every single game cover to be loaded, good luck with that as I have tried to get this to work in multiple loaders for years. Internet is only necessary to download the covers if you don't have them, in which case I'd recommend ManaGunz or mmCM way before IRISMAN. It's simply too many files / too much individual data for the PS3 to load them all perfectly
I have 60 PS3 games and all NTSC-U PS1 games A-H on an external drive which I gave up on filling a year ago because it causes the Retro section of mmCM to constantly refresh itself in an attempt to grab new covers, some of which it can't find for games anyway.
My point being, it does not matter which homebrew loader you use. mmCM, ManaGunz, IRISMAN and webMAN's loader all have issues with loading game covers. mmCM is the closest you will get to having a flawless game library and it can take hours to get a perfect refresh that shows all the covers as it should.