How to change your Battlefield 2 CD KEY w/o reinstallin

BATTLEFIELD 2 GUIDE

Click Start.
Go to Run.
Type regedit and hit OK button.
Click on plus sign next to HKEY_LOCAL_MACHINE.
Click on plus sign next to SOFTWARE.
Double click on Electronic Arts folder.
Double click on EA Games folder.
Double click on Battlefield 2 folder.
Double click on ergc folder.
Data displayed will probably have x9392 only.
Right click on it and select Modify.
Type in x9392 and then your CD key.
note: don’t include hyphens.

Example: x9392(your Battlefield 2 CD key here)

HAVE FUN!!!

its not working :S

It works, thanks.

confirmed, works for call of duty too