I remember having difficulty with that level too.

I think this is what you want:

After you find Alice:

"Before you can leave, log in to Harlan Wade's laptop to get some vital details. Your next task is to escort Alice Wade to the roof for extraction.

As you walk back towards the balcony area, you'll hear some radio chatter. Three Replicas are waiting to ambush you. Walk into the office and look down over the balcony. You can shoot one of the Replicas in the face before he knows you are there. If you are quiet enough, the other two will wait. Crawl around and shoot one out from the top, then wait for the final one to come running up the stairs to investigate. Take him down when he comes into view. Don't leap off of the balcony or Alice Wade won't know how to follow you. Instead, walk around down the stairs and into the open elevator.

Rather than simply taking the elevator up to the top floor, it will stop several times for battles with Replicas. Stick to the corner of your elevator car and peek out to shoot them. On the second stop, jump out before the doors close again so that you can pick up the two Medkits in the back of the room.

The fourth stop is the last one. The power goes out, so you'll have to go investigate. Walk around and grab the Medkit near where you can deactivate the security panel. The elevator closes, so walk off in search of another way up. Go through the now open gate and then into the door. Continue along until you come across a couple more Replicas. Stay in the shadows and shoot them down in a surprise attack. When you come to the top of the stairs, look for an air vent to knock out and climb into. Crawl ahead to complete this stage. "

I found that here:
http://fear.wikia.com/wiki/Interval_07_-_Redirection_-_Alice_Wade


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Your questions:

Q1) Links to any good maps I can use?

I'm not aware of any walkthrough maps. I'd suggest watching a video of that level if you really need to. If by maps you mean extra levels, no clue. Most are for multiplayer which I don't play.

Q2) How do I get Alice "unstuck" from this "Main Lobby"?

See the solution posted above. Watch a walkthrough video on youtube of that level if necessary.

Q3) How do I take screenshots?

Method 1: by default the (F8) key takes a screenshot in BMP format and places it in your \Documents and Settings\All Users\Documents\Monolith Productions\FEAR directory.

Method 2: I use the Print Screen button on the keyboard. Then pause the game, alt-tab out of the game, and paste it into Irfanview and save it from there. You can use any image editing software. Irfanview is free and works well.

Q4) Where are my saves?
I'm using Windows XP and they're here:
Documents and Settings/All Users/Documents/Monolith Productions/FEAR/Save/Profile000/SinglePlayer

It's not even remotely clear which save file is which though.