So I need help apple or anybody else, I have windows 7 and steam.

these are the steps that i understood to do with steam and win7 :

for example:
at first I made a new folder, I called it RSII on my desktop.
2nd Step is to install the game into it.
So and then I have to paste the new RSII folder where the files are in to my : C:\Program Files (x86)\Steam\SteamApps\common\rome total war gold
folder ?

so its called C:\Program Files (x86)\Steam\SteamApps\common\rome total war gold\RSII

and then? I made it with -mod:rome blabla, but when I startet the game with the launcher, it tells me that I made something wrong..that I didn't install the game to the correct Steam path

help fast pls..