Welcome to Subsim Asem,
Herr Admiral (
) is right. Your system should run out-of-the box SHIII. You might have to tone down the graphics settings to an acceptable level. Yes there are some mods like the above mentioned which add better looking textures and graphic improvements. Unfortunatelly your laptop wont be able to cope with those. And im SURE youll buy a new system after playing this game. Its impossible not to
Cheers!