Rome: Total War - How to fix your campaign map lag

Hi all, this fix might work for you if you have Nvidia Optimus enabled laptop. For some reason the game won&use the dedicated video card, hence the performance issue. I have both Barbarian Invasion and Alexander expansions, works with them too. I have Steam version of the game, but before i had disc version, had the same problems. This fix i found it on Nvidia forums, credit goes there. Only drawbacks are there will be no fire effects for arrows and onagers. At least that&what i experienced. Just download this dll file, add it to Rome TW main folder.