When a zdata file needs to be modified, CM mantains the relative Bh File and the fifa.fat file automatically updated so you don’t need to run any regeneration process.  All the changes that you make to a zdata file during the editing process are saved immediately. For example, if you load a new kit, it is saved immediately in a zdata file and you don't need to make a save operation when you exit the program.

If you would like to prevent an editing session from accidentally modifying zdata files,  open the Options Menu while you are not editing and uncheck the option "Allow Zdata Saving". By default it is enabled.

Which zdata file is used depends from the Options selected.

·                 If the option is set to "Automatic Zdata":

a) If the file already exist it is replaced in its current zdata

b) If the file does not exist, CM selects the first zdata with less then 500 files and add the file. 

·                 If the option is set to "Specific Zdata":

The file is always added in the specified zdata. If the file is already present it is replaced. Continuing to add file to the same zdata can produce a huge file with the risk to run out of memory during the editing operation. Therefore you should pay attention to change it when the big file becomes too big (I recommend to change zdata number when the size grows over 100 MB)

·                 If the option is set to "Save directly in the root folder"

The file is saved directly in the FIFA 10 folder and not in a zdata archive. If the file is already present it is replaced.