You know that Personas 3.0 was first released to run on top of Netweaver 7.40 (EhP7) systems.
If you are interested in having the SAP Screen Personas 3.0 in a lower release, please read this Personas blog.
From the ITS/WEBGUI perspective, the key change is the adoption of kernel 7.22.
My own experience as pilot tester was successful.
I was able to have the Personas product installed in all supported lower releases: 7.00, 7.01, 7.02 and 7.31.
Please contact our SAP Personas Team if you are interested in this matter.