[Wine] Switch for pixel shader?

[chris_c]

I haven't owned windoze in a few years and decided to dust off a few old favourite games namely Oblivion and GTA San Andreas

For Oblivion I need to turn on pixel shaders in the winecfg app

When playing GTA I have to turn the pixel shaders off because it runs very slowly

Is there something I could run in a script before executing each game (in the same script) which would either turn pixel shaders on or off