Can somebody work on trying to get this into UpdateMedia itself? We shouldn't have to run a "script" ... perhaps by doing some introspection of the files we can at least set format, and use directories for the others.
If you're referring to donpaul's script, the autotag patch I submitted six months ago integrates with UpdateMedia to do this and more. It is based on file / directory path, allows regular expressions, and allows you to set/update/add MediaType, MediaSubType, ShortAttribute, LongAttribute.
Edit: To clarify - it does not do any introspection on the files, though I think that's a good idea and separate from the autotag patch.