AW: Maya v1.1 Stable ***29-04-11*** for MP 1.2.x
I don't know if that is possible, BUT: Could the installer check the version numbers or at least the existence of the plugins? If so, a warning would be fine, that there is already a newer/other version installed...The installation of the plugin is still a very long time in the installer and we have never had problems.
If you install Maya and after the StreamedMP and aktivated the Plugins in the StremeadMP installer he overwrite the existing plug-ins. The same is in Maya amd other Skins!!!
If you not checked the Plugins in Maya Installer the PLugins on your Machine will not overwrite.