Whenever I use the map manager to install a custom map I can't get the map to actual start up and load, the only custom map I can get working is nuketown 1945 and I used the old way of installing maps to get it to work(andI use the devmap command for it to start).

So you have W@W uncut and Version 1.7 ( i think) ?

Yes, I have a legal version bought from steam