Doom 3: Resurrection Of Evil Q&A

Does anyone know how to do the Master Levels. Because I'll look on my map and it will say like Attack but when I save it and load it back up it has something else. I seem I can't get it like there's no end. Any clue will be helpful. THANKS

I got through Alpha Access and killed everybody. Now I cannot locate elevator or whatever to get out of there and move on. I keep getting electrocuted by all of the wires. Need a hint!!!
Tomboy