I had this working before, and I did it like this:
Play a 2-player game on the PS3. Pick the setting where the mode is split screen - either left/right or top/bottom. For my set-up there was a 3D converter box involved. I had to turn the box on and set it for 3D t/b or 3D l/r depending on the format of the game's split screen. Once that was set I put the TV in 3D mode and selected t/b or l/r once again. Next you need glasses that do L/L and another pair the do R/R.
Simulview on the PS3 on works with Sony Simulview enabled TVs. Lame. The fake method should work on any set, but it isn't true simulview.