First time ever modding anything and I'm pretty computer illiterate. Followed all the steps through to get the ARKMOD stuff on the PSP 1000 up and running and went to the emulator websites. Was told I need ISO files.

Where the heck do I find these files? Nothing is in ISO format. Is there some other emulator that I need to download to work it? I just wanna play GBA SNES and PS1 on my handheld here.

Followed this tutorial for reference: https://www.youtube.com/watch?v=0SwdVNMV6oI