As blogged
here and mentioned in
this discussion, you may get errors in a certain part of the AutoSPInstaller process if you run the script from within a user's folder (e.g. "
My Documents" or
C:\Users\username\Desktop\SP2010\). Best bet is to run from a commonly-accessible path such as
C:\SP2010\AutoSPInstaller or even a UNC path like
\\server\share\SP2010\AutoSPInstaller.
Cheers
Brian