It is one of the files in the data folder (might be data2) called I think playercolors.xml or something like that. If you only have an xmb version used a tool like AOMED to convert.
Alternatively for the colour changer try running with Administrator Mode as permissions may be preventing it from working properly.
[This message has been edited by nottud (edited 12-25-2018 @ 09:28 AM).]