Adding a package to a schema provides a way to quickly add that functionality to the schema. Some packages allow modification to record types that already exist in your schema. Use this window to allow these modifications either during the installation of the package using the Package Wizard or after the installation. If you choose not to allow modifications, the record type and certain functionality will not be available for the package you installed.
Select a record type from the list. The list contains only those record types that the package can modify.