Is this possible in Jpcsp?

[montcer9012]

Vertex Cache:Speeds up many games in menu but games slow when playing with it
Use Shaders:getting corrupted graphics in wwe 2011 and some more games
Enable decode of indexed textures (Using CLUT) in shaders:blank screen

I didn't say those options where universal and all the games take advantage of then; however, i suspect there's something wrong on your config or you are just looking for an perfect emulation (Which is impossible).

Remember that the emu still on BETA phase; you must help yourself with newest video drivers and always looking for the best match between the video options.