Help on SAP PERSONA upgrade 2.0 to 3.0

Hi ,

My team and myself are new to SAP PERSONA . We have been given the link for upgrade https://wiki.scn.sap.com/wiki/display/Img/Getting+Started+-+Personas+2.0+to+3.0+Flavor+Migration

As a prerequisite its metioned we need to have 2.0 and 3.0 in the same system . Cam anyone elaborate this .Do we need to install the newer version .in the development.