Have you got the GAPI tweak? If so, you might need to turn it off, it could be incompatible.
Then update to the
latest beta version of FPSECE and switch the rendering mode to 2700g in the options. I can't remember exactly where that option is, I don't have the program installed any more.
It's still slow though, I found hardly any games ran at playable speeds when I tried. Unfortunately I think that's because although the program uses the 2700G framebuffer for speedup, it doesn't make any use of its rendering capabilities and so all of the graphics are still software rendered. If someone could write an OpenGL-ES plugin, the 2700G would do the rendering and everything would be much faster.