I have an idea. If you have the older version of RaW, then your AI and FPS are messed up. RaW customizes the base FOC files to be able to run the mod itself. My Theory is that RaW may be interfering with the files in ICW because of those specific reasons. If possible, you should probably delete RaW (finish any GCs first) then launch ICW. If that works, delete the old RaW mod that you have and upgrade to the newest version of RaW, it doesn't mess with the base FOC and it should probably work. Good Luck.
Edit: You could also mess with the VIDEO options in the game itself, I have a lot of stuff turned off because I use an old Laptop like you and my game runs smoothly. Well except big battles (even then I barely have enough FPS to see what's going on). I hope this helped too, I wouldn't want you to go through the hassle of everything I mentioned up above. I hope this method works too!