I just tried to install Win7 (64bit Home Premium) on my Inspiron 1520 (Vista 32bit home premium) by help of this threat. I downloaded an image of Win7  from the Microsoft-Server, burned it twice (Nero and Acohol). The DVD worked well so far and I can boot from the DVD and load the Win7-Install-Screen.

After confirming language settings and pressing "install" I get a message that there is missing one driver for my CD/DVD device(german quote: "Ein erforderlicher CD/DVD Laufwerkgerätetreiber fehlt). I tried to load some chip set drivers, but it won't work. What drivers have I to use? What's the solution?