what version of toribash do you have?
With 2.6
Save mods here
C
Program Files\Toribash-2.6-beta3\data\mod
You have to be registered in 2.6, then go to the menu, click mods and click the mod you desire.
With 2.5 or below
Save mods here
C
Program Files\Toribash-2.5\data\mod
start a single player game and type /loadmod modnamehere.tbm
I hope that helped =)