Just to complete this, I could not get 329 to install for reasons above.
However I just upgraded 315 directly to 1.6.339.0 and that works ok, at least it does not throw this error. So I still don't have a virtual directory, but now it's back to not caring about it. Whatever, this may help someone.
However I just upgraded 315 directly to 1.6.339.0 and that works ok, at least it does not throw this error. So I still don't have a virtual directory, but now it's back to not caring about it. Whatever, this may help someone.