I am trying to customize the registration portal so that only four questions appear, but the user is able to select different questions from a drop down. Currently it just lists the 10 questions populated through the FIM workflow.

I also need to customize the screens in the rich client, when users are using the SSPR from the desktop, to include company branding. As well as re-word some of the errors they end-user may see. I was able to get the branding and error messages switched in the web portal.

Please let me know if this is possible and if so how?

You can only customize CSS and some strings in the SSPR Portals, i am not sure you can make the questions appear as a drop down

Also, rich client is not customizable. We only invested that in SSPR Portals

Is there anything in the works to be able to modify the rich client in a future patch?