InfoPath Dev

I have a infopath 2003 form that I am trying to query the secondary data source to retieve a record and fill in that info into my form.  The main data source has to stay the main because I am filtering data from that source for the first part of my form.  Any idea on how to pull a record in from that secondary data source.  Thanks.

In what field are you trying to display your data from the secondary source? If you want it in a table, in the right hand pane click Design Tasks > Data Source and select your secondary data source from the dropdown. Drag the node which contains your data and drop it into the form as a repeating table. On preview of your form, your query will run and data from your secondary data source will be displayed in the table.