Filter Rows from DataTable into another DataTable
	DataTable	tNew = new DataTable("LowNumberedNodes");
	DataRow[] rows = ds.Tables[0].Select( "T1NID < 5" );
	for ( int i=0; i<rows.Length; i++ )
		tNew.ImportRow( rows[i] );
Thanks to Kraldon for pointing out the c# way of doing this would be:
	DataTable	tNew = new DataTable("LowNumberedNodes");
	foreach ( DataRow r in ds.Tables[0].Select( "T1NID < 5" ) )
		tNew.ImportRow( r );