Would be nice if VU could use another primary registry key, (like "HKEY_CURRENT_USER\Software\Emulator Nexus\Venice Unleashed" for example) and only use the registry values of "HKEY_LOCAL_MACHINE\SOFTWARE\(Wow6432Node\)EA Games\Battlefield 3" if the primary key didn't contain the "Install Dir" value.
That way users (specially modders) could add those registry entries and create a sandbox folder for VU, instead of modifying their Origin game folder.