@ Bond - errrrr not sure how search would help here, mate !
@ Lost Heaven - when I try to change attributes it comes up with Administration authorisation required, as this user on laptop has Admin rights, I click to proceed. It goes through the changes, but after I click ok at the end, file reverts to Read only.
If I open Data/cameras.ini in notepad to put in the new figures, when I come to save, it says access denied.