The original list of steps generally worked well for me. However, the Import and Export items on the Module Actions menu failed to appear at all. This is because the IPortable interface does not properly register if the files (in particular DynamicRegistration.ascx.vb) in the App_Code folder are not present when the PA is uploaded on the Module Definitions through the normal process.
To resolve this, I swapped Step 4 and Step 5, manually extracting the 26 [app_code] related files into the App_Code\DynamicRegistration folder BEFORE uploading the PA.
Bill Bowlus