I don´t know when the 3 744ERs will be delivered to Thai, but they could get them quite soon if they wish. If they would wait for the "Q" it´ll take some time, apparantly not before 2005 as it looks like now. Boeing is in talks with RR for a new Trent 600 engine for the proposed new 744 derivative. This engine, superior to the improved GE-propulsion planned so far won´t be available before 2005. But I guess this new engine would attract more customers, because its a total new construction meeting the strictest future noise regulations.