The game of CFS1 is still on the Zone but M$ are winding it down so there tend to be times when almost nobody is around now.
If you use this link
http://zone.msn.com/en/root/flightsimulator/ it will take you to the sign in page.
The route to get into CFS1 on the zone is tricky so make a note of these steps or you still won't find it:-
1) Sign in using your M$ passport.
2) Hit Enter when required to.
3) A new page will appear first which is nothing to do with CFS1. Ignore it and re-enter the link
http://zone.msn.com/en/root/flightsimulator/ in your browser window and enter to forward to that url.
4) after a moment you'll see the Flight Simulator section games window open but it will not show any games. Wait for a small "Zone friends" window to open bottom right of your screen, then;
5) Hit Refresh.
The main browser will now refresh. Although it is essentially the same page you will now see a number of game rooms open that were not there before.
One of these (probably the last on the list) is Combat Flight Simulator 1 and the room is called "Furball".
Don't despair if there aren't many around, you just caught it at a bad time, try again later.
Blue skies.
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