Sorry to open a new Topic for the subject mentioned (and it might be a stupid question also) but actually, i'm looking for this facility since the time i read the Topic of CDOB. I was looking for his solution "How to install multi operating system by the use of USB Flash and finally i got it from his Topic (thanks CDOB). i Bought a new Labtop (Acer Aspire 5738) whitch has a built in SD Card reader. When i used Flash memory 2GB to simulate his solution, the Flash seen as Preffered Boot Drive U: M