Did you take advantage of the super Steam holiday sales?  I did, and got the complete Battlefield 2 pack for $4.99.  However, if you installed it and got it all working – you might keep getting kicked out of network games because PunkBuster reports that you have an ‘Invalid driver version/game’.  This is because of the Steam Community overlays.

1. At your game library list in Steam, just right-click the Battlefield 2 icon
2. Select Properties
3. Go to the General tab
4. UN-select the ‘Enable Steam Community In-Game’ option.
5. Voila

Yes, annoying.  Can’t believe old games like this haven’t been re-modified by steam to not need the now-ancient PunkBuster system.  The fact they’ve had to update PunkBuster to be separate Windows Services now in order to work shows you it’s time to see that stuff go.