I think all my ps1 images are bin/cue and whichever playstation emulator I use runs them directly without mounting the image. I think mine *is* ePSXe? Not sure, I haven't messed with it for a while. But, if you familiarize yourself with the autohotkey stuff you can have it mount and unmount the images for you automatically, you'll never notice it. Go to the hyperspin page and check out some of the ahk modules there, Saturn stuff for example.
Daemon tools lite works great.