machine.config question

I've got a Web Service that accesses a SQL DB thru ADO.NET. In order to
access the DB I have changed the userName in the machine.config
processModel tag from "machine" to "SYSTEM"(this used to be the default
setting in Beta 2 I believe). I'd like to just set something in the
web.config for my particular application instead of a machine wide setting.

I was thinking I could use SQL Authentication but I'd rather not for this
particular application - is this what other people are doing? Has anyone
else come up with a better way than setting the machine.config file for
this situation?

Thanks,
Mike

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