Gordon, you mention to re-download the installers. How would this help if the developer has not updated them and they are no different than the ones we have?
From what I can see, the scenery packages do not need any major changes, but the installer/add-on managers now install a bit differently than before. If the devs have updated those installers, the scenery should be good to go in V4.
I've checked out SFO, LAX, LAS, PHX and KDEN...all check out fine.
Workflow:
I went to Flightbeam first and confirmed that their airports were going to be upgraded. The home page had all of the info. I re-downloaded KSFO HD and checked that the installer included P3D v4. That was an affirmative.
I installed the updated SFO into P3D v4. BTW...the update is free if you already own the previous version.
The installer also updated the Virtuali manager, which then checked all of my other packages from Flightbeam, FSDream Team and Aerosoft. I had saved out my old installation files from v3 and placed them in V4 root folder.
I re-booted the computer and the sim after the SFO install and the Virtuali manager then recognized, and activated all of my scenery locations automatically. One shot deal...that was a bonus.
I noted the addition of the Add-ons xml management system when I looked around under the hood. The xml is a straight forward code that only wants to know the name/description of the airport and the file locations.
After looking at the new syntax, I created xml's for my WIP sceneries and airplanes as well and integrated them via the Add-ons folder.
Everything worked smoothly, even the monster HD ground textures for KMMH and KBIH.
All in all I think the transition should go off very well. I give it all a two thumbs up.
Just waiting for the FSUIPC5 upgrade to go live and I'll be a happy man.