I have the PSIO device, and I've loaded this Tool, and I was able to load Orion's homebrew on the Pocketstation. Obviously that device has a limited storage capacity.

Realized I needed to use PSOne ISO Maker to create new BIN and CUE files. Then loaded PSIO again, and PSLoader had new files to ...

There's a market for it. I have the GDEMU, and it works well, but Deunan is finicky and no telling how many more he will produce. The other device, the USB GD Rom Controller, is even more difficult to get.