Hi Cory Rogers,
Currently we do not have a feature to specify batch update for type mappings. We would like to introduce something similar in one of our future releases and any suggestions as to how you would like such a feature to look would be highly welcome. There is a way to specify the CLR type mappings if you work with the classic wizards. You can use the Backend Configuration dialog
which is available with the old menu entries and is applicable only to the classic wizards but not the visual designer.
We will appreciate any feedback you can give us.
the Telerik team