Hi Daniel,
If you want to add new row when paste data from excel, then you will have to handle the entire paste yourself. You can do this by catch the grid.Model.ClipboardPaste event and add the new row using the underlying datasource of the grid( For DataTable,use DataTable.NewRow method).Than paste the add over newly added rows in a Grid. Here is a forum thread that shows this "How to customize the ClipBoard paste technique in a Grid?".
http://www.syncfusion.com/Support/Forums/message.aspx?&MessageID=54349Best regards,
Haneef