Itatsumaki,
There is a commercial product here that does what you are looking for. The cost looks fairly inexpensive.

You can also do a search on ASFRecorder. Best as I can tell, a guy reverse engineered how the streaming media worked and provided open source on how to do it. The author remained anonymous, and got hired by the very company he - well, you get the picture. It provides a batch operation. The two most relavent links are here:

Down Load

Sourceforge

Of course this is written in C and would have to be converted to Perl unless you just want to use one of these tools.

I in no way endorse the use of the this product to make illegal copies of media that is not owned or licensed.

Cheers - L~R

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