Hi,
As confirmed, MOICE was developed for Office 2003 and Windows XP user to enhance security. This feature has been replace by Protected View in later versions and is not an integration feature in Office 2013. So its not necessary to keep it.
And the default path of the OICE_PID is written in hard code, so theres no way to change it.
Hope above information is useful for you.
Following information quote from
this article is FYI.
Once MOICE has been installed on a computer, when you double click a
file with one of the extensions supported by MOICE, MOICE is automatically run to convert
the file. The result file is created by MOICE in the "%TEMP%" directory (i.e. " C:Documents and Settings{username}Local
SettingsTemp") and this file is then opened
by the appropriate Office application.
This behaviour is quite disturbing if you modify this file, because when you save it you must move it from the "%TEMP%" folder
to a more appropriate location. It is
also highly suggested to manually delete the original file. If you don't and choose to keep the ".doc" and ".docx"
files (let suppose you work on a Word document) both
in the same directory, there is actually a risk that you later edit the old ".doc" file instead of the new ".docx"
file (which is the only one that includes the changes you
made in the document).
Let me know if you have further request, thank you.