My maps refuse to save

[BluffCreek]

Use the second option.

If you have problems locating your installation folder after that, right click your icon for starting AC, click properties, the click open file location. It should open a explorer window to this folder. Go up one level in the file system, then right click your folder to set the permissions for it.
You want to have administrator privileges for this. If you do not, log off your windows account, and log in with the admin account.
Your custom content for AC, along with screenshots and what not, is in My Documents\Assault Cube v1.2.

This is all mostly necessary, installing the game with the second option should make everything work out of the box.

I got it fixed, but thanks anyway! :)