Just grabbed it and off to test...
Team sR: a backup HIGHLY RECOMMENDED until TGL releases the 2142-Pro update. This will save you from any hassles and unneeded tap dancing.
To backup:
1. Copy your BF2142 folder to C:\....\Electronic Arts\ . This will create a new folder named "Copy of Battlefield 2142"
2. Patch away
To revert between the 2:
1. Rename "Battlefield 2142" folder to something meaningful (e.g. "Battlefield 2142_old", "Battlefield 2142_new", etc.)
2. Rename "
[backup folder name]" to "Battlefield 2142"
3. Play away