MisterCerberus

Thank you, that did it.

I am aware that PatcherGUI is necessary for installing XCOM mods. In the instructions for the program, it states that the game should not be installed in 'C:/Program Files', because the mods will not work if it is. The problem is that if I tell Steam to install the game into another folder, it simply returns 'There is already a Steam folder on this drive', which is true, that's where all my other games are installed, but it's in Program Files. Is there a way around this which doesn't involve me buying a new drive or uninstalling and reinstalling all of my games?