Dell windows 7 upgrade query i noe this is a very silly wuestion but still I have inspiron 1545 with slic 2.1 and inspiron 6400 with slic 2.0 i have got windows 7 upgrade from dell which i want to use with my inspiron 6400 as i have already installed windows 7 on my 1545 using the slp keys in the sticky. I want to know is it directly possible or i have to do something 6400 has windows vista ultimate installed on it and have windows 7 ultimate upgrade...plz help and guide me through the process...