that is possible but it woulnt have really anything to do with the crap part. it would be entirely up to the loader which is booting the game. i have added this ability to boot games via argv[1] to USB loader GX and it just uses whatever is the last partition you had active in the loader. but it meant that there is nothing you or your friends would need to do differently. whatever is the partition you are using last will most likely have the game which you want to boot. the forwarder channel doesnt need to do anything about the fat/wbfs partitions so 1 channel will work with either variation.
i havent seen the source for cfg loader, but i assume it works in much the same way.
i havent seen the source for cfg loader, but i assume it works in much the same way.