Good Luck on getting SM answers I had to hack my own, using 8 buttons and lots of combinations. The key is that most sets only react to a sequence on the sets power on/off controls, not like some DVD players that you can use the remote control.
Get into trying different sequences you write them down and eliminate them one by one and do a rightious hack. I know how to get into my DVD SM by hitting title, clear and power on Sony CX-860 Mega Changer.
I hack to find things I own, not to crash systems or slip worms or trojens into other systems, that seperates the good from the bad hackers.
