BIS Tools drive information, ie P:\
This tool will create a P: drive on your hard drive using the SUBST command. It only associates a folder to a virtual drive.
Custom location
You can change the location during the installation process in the installation options.
If you are using P: drive for a different device already, you can change the drive name in the “..\My Documents\ArmAWork\mapdisk.bat”.
In this case make sure to adapt the path also in Oxygen 2 PE, File → Options and in Visitor 3, Tool → System Preferences.
More drives
subst t: "d:\subDir\armaTools"
First parameter: drive name/letter. Second parameter: source location to link virtual drive with.