Hi STLCOP_IT,
Please check for Windows Installer is set to manual and started. Navigate to start/run/Services.msc/Select Windows Installer and check it should be set to manual and services status should be started. If this does not work perform selective startup and try installing again: http://windows.microsoft.com/en-in/windows-vista/run-selective-startup -using-system-configuration.
Try installing from hidden admin: http://www.howtogeek.com/howto/windows-vista/enable-the-hidden-adminis trator-account-on-windows-vista/
If still the same issue then kindly download Photoshop from the mentioned link: http://prodesigntools.com/adobe-cs6-direct-download-links.html . Create package again using AAMEE 3.1 and try to install.
kindly let me no how it worked.
Regards,
Romit Sinha