[Mobhack]

Don't even think about copying any modified OOB into your OOB folder directly.

Create a sub-folder to unzip the modified OOB(s) into, and use the OOB swap utility to load the mod when needed, or to reload the official one when required from the backup set of official oobs included for that purpose. ( Located in Game Data\OOBs\Default OOBs).

Photos will go in the usual folder - cannot be swapped in and out, but do not affect game play (but weirdness can occur if the OOB modder has overwritten stock pictures!).

However, if the mod has a changed AI pick list then you have problems as AI picks cannot be swapped and they will affect any AI purchase if you try swapping the default OOB back in - see the sticky at the top, ie basically create a brand new game installation for such AI mods.

See the Game Guide -> Game Installation -> Manage OOB Sets for the default case (modified OOB with no AI pick list changes)

cheers
Andy