If you added te proper line t you .ini file already, then all you have to do is hit the "~" key, then type "giveitem" followed by the item designation.
You should note however that once you hit ~ the console is open, but you can't see it. Obsidian made it not visible for some reason.
So if you wanted to get the mesh dancer outfit for instance you'd type this:
~giveitem g_danceroutfit04
<{POST_SNAPBACK}>
Whats the line because when I tipe EnableCheats=1 it still dont wok when I hit ~