Problem - Patching Failed
Cause - System Dependant
Fix - The Exact cause is not really known in most cases, some people have more success in patching when using the FULL patches instead of the Incremental ones. In addition, the patch may be corrupt when downloaded so if you have problems try downloading it from several different sites to see if it works with any of them.
You could have faulty RAM, try running a program called Memtest86 to test your ram for errors. Also try removing a stick of RAM from the machine to see if it helps running on just 1 stick of RAM.
There is a possible fix Here
http://forum.eagames.co.uk/viewtopic.php?t=9586 which you may wish to try.
Additional information can be found here
http://forum.eagames.co.uk/viewtopic.php?t=2327Problem - Not Enough Space
Cause - Need more space on your System Drive
Fix - The patches now require roughly 3GB of free space on your Hard-Drive, it will not usually look where Battlefield 2 is installed but on the drive where your operating system is installed.
But there's a workaround, (Important, Before changing the registry, read Warlord's Warnings just below the contents page at the top of this FAQ)
Open regedit.exe and search for this key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\ProgramFilesDir
It points to "C:\Program Files" by default. If you change the value to "E:\Program Files", the patch will look for 3000 MB free space on drive E instead of C.
So Change it to look on a Hard Drive that has enough space for the patch to run. After the patch is completed, change the registry key back to what it was before you edited it.
Peace Boris