.ISOs not being found.

Posted by taima on .
Hi, finally decided to make an account here, been using Vimm for...gosh...I want to say 12 yrs or so. But that aside, I have been downloading PS1 games and most of them run fine. Some I get though only have the .ccd and the .sub files. When I go to run them, it says the .iso file is missing and shuts down. Am I doing something wrong or do I need to get the missing file from somewhere else? I am using ePSX downloaded from this emulator lair.