I don't put them their because I want as little as possible on my internal hard drive as possible. I have a 750 gb hard drive in my ps3 and its almost full with installs and the like whereas, on the otherhand, I have my 2 tb external drive with plenty of room. Also, with your roms placed in the actual snes9x install folder, if you ever update and arent careful, youll erase all your roms.
Also, my roms are mostly zipped but i unzipped a few (all with the .smc file extension) and still, no snes games detected in multiman.
I edited the options-default.ini many times in the past and am just confused as to why this won't work.
Also, does snes9x show up in your games list in multiMAN? It doesn't on mine. I've tried re-installing the included test snes9x a few times and no results. It shows up on the actual XMB but not in multiMAN. I also made sure that RELOAD.SELF was at /dev_hdd0/game/SNES90000/USRDIR/ and it still wont show up in my games list.