Increasing FPS

I need help increasing my FPS. I want to run the whole game in Window mode instead of just the menu in windowed mode to increase my FPS and keep a good balance of RAM. Does anyone have any tricks they use to increase their FPS? I do understand my computer cant handle all of Crossfire's needs but I love the game and want to have a more enjoyable time playing it. Ive already put 16 bit, 800x600 resolution, low textures, etc. I just need a couple of more nudges that I do not know about. Thanks!

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