This Jms Multi Sites, fix a bug in the new installer compatible with joomla 1.6 and introduced in the version 1.2.53.

When installing the 1.2.53 version, the installer didn't use the latest manifest file present in the package but re-use the older one that was present in the previous version installed.

The new version fix this issue and now is using the latest manifest file for joomla 1.6