Hi Could I trouble you again to add the wod "NIWA" to the attachment as I mail filtering deletes anything without this. thanks again Shankar ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Ude Shankar National Institute of Water & Atmospheric Research PO Box 8602, Christchurch tel +64 3 343 7892 fax +64 3 348 5548 email: u.shankar at niwa.com