I'm planning on that, but I didn't have a properly finished config and some of the settings are still being moved/removed/added. I'm working on finalizing it right now, .
I also finished the argument parsing, so loading the configuration from the boot path should work for usb drives and memory cards in the future. I removed the "Mass" setting from the configuration, since it's no longer needed. The "modules.tgz" archive is still loaded from the SYS-CONF directory for custom usb modules.
Oh yeah, if you have two ps2's, or some other method of modifying files on a memory card. I've had snes9x reloading the settings between every rom, for now. The next release will have support for boot paths on mass, so you could just take it out, modify the config on a computer and plug it back in, assuming no other usb drives are there. I'm not sure if usbhdfsd would reorder the devices...
New release is up.
I'll start focusing on making Snes9x faster, now, since the basic functionality is done.