I have many Oscommerce catalogs. They are installed each one in differents database servers, with diferrentes usernames and passwords. I use a shared webhosting plan in [url removed, login to view]
I need a system that allows every catalog to share users each other. For example: When someone makes a new registration in a catalog, he can use the same login automatically in the others catalogs. And even also when the user changes his personal data, or any kind of data associated with him, the update is automatically reflected in all related catalogs.
The system has to serve both the catalogs I have now, and for those who need to add or delete in the future.