When the CS6 Externded version comes out, do I install it over the CS5.5 extended version or over the CS6 PS. Or, is it a complete new install?
It will be a new installer. I'll need to confirm whether the install will replace the beta build, or if the beta build needs to be uninstalled first. The CS5.5 version can stay on the same machine.
Sorry, I don't believe Adobe has announced anything regarding specifics on availability or pricing for Ps CS6.
You can request to be notified when Photoshop CS6 is released by going to this link: