InfoPath Dev

Not having much luck with this.  I can not find a document that tells you how to do this.  They focus one writing the url string and assume you know what to do with it. This is the url string: ...

Is there a way to have a udcx connection bring in a subset of a sharepoint list.  I don't want the whole list and you can't filter it when using Form Services.  I work in a large corporate enviorment so upgrading to sharepoint 2010 isn't going to happen anytime soon.  Also custom web services are off the table.  I ...