Codecs are various locations but:
Is for the win32 codecs. You can specify this location in the configure process though if you want to choose a different location.
And in the future, you probably don't want to address your question towards a specific person, it's going to get you quite a bit less views/responses, plus you only get 1 opinion if only 1 person answers. There are other ways to do things, especially these things (you can set these files in the user home directory for example) so it's good to get a wide variety of answers