I am downloaded this and then I burned it onto a 8GB dvd using powerISO. I put it in my laptop, restarted, and hit F12 to boot from CD. It was at a blank screen for a while, looking like something was going to happen, then it just went to the windows bootup screen. I have no idea why. I've tried restarting so many types and trying to boot from the CD drive but everytime it'll just end up going to the windows login.

The laptop I'm trying to install mountain lion on is a:
Dell Latitude D830
Intel Core 2 Duo
Windows 8 OS

Any ideas on how to get this ISO image to bootup?