I cannot find where i must select folder

[Nico75]

Hey,

I just start to use Plotinium and i read the doc to install black Ops Zombie but i can't find the right folder as mentionned.

I don't have " C:\Program Files (x86)\Steam\steamapps\common". This folder is elsewhere but it doesn't work.
And even with other game.

Can someone guid me a bit please ?

Thanks a lot.