That is the process I have been using for several years as I couldn't seem to get the documented steps to work correctly (user error I'm sure as I know the steps work). Creating a dummy install is very quick and all of my environments accept the new certs from my local dummy install. The only thing I would add is when running the installer in a location that already has aras is use the changeguid.exe on the innovatorsetup.msi to avoid messing up the previous install. I just install it in a dummy location on my local PC and copy to my servers.