Open a remote page inside a aspx page containing server controls

Hi,
 
 
I would like to open a browser window with content from two sources together on same page.open a remote address in another browser window; So that the page feels as though it is part of own website. The problem with this, is how may I open the remote address page inside a aspx page that also contains controls for adding data for insert purposes. I want to be able to use the remote page as a information lookup table while adding data. Note: On the main page used for data insert, one of the insert controls requires reference to a remote page (http:) data tables.Therefore as a design scheme I though about creating a link to open another browser window page where I may add and return data to Parent page for database insert. ???