How to run/create multiple instances/profiles of Opera 12/15 under only one Installation (at the same time)?

How to run/create multiple instances/profiles of Opera 12/15 under only
one Installation (at the same time)?

Asus Laptop Windows 8 32-bit
1.) How to run/create multiple instances/profiles of Opera 12/15 under
only one Installation (at the same time)?
2.) Also, is this also possible in StandAlone installation, or do I need
to make multiple copies of StandAlone installation in different folders
inside USB drives?