Sorry i mist this topic, i pointed Pype Clicker to the image by jas2o, because that image works in a emulator.
I do not use emulators so can not comment on any problems to do with them, but here some pointers, "Dex4u" CD driver only reads the root Dir, so if you try it with a disk that does not have any file in the root Dir just dir's it will not print a list, also it reads file names in the 8 letter name and 3 extention.
Having said that it will show whats on a bootable linux disk.
Try a differant disk, also try it in a real pc, but to be onist i have not seen, so far any emulator, that the cd works in .
Any more ? just ask
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PS: The "run" command i agree is a pane, but it speeds search up a bit and "Dex4u" will be a GUI based OS, but its best to get things running in a CLI first, it will also be good for problem solving later .