Overall, the process is very simple (it’s been inspired by a similar project with Ubuntu). D-I-L runs on the users’ win32 system, auto-detects wether the CPU supports 64-bits, picks the appropiate linux and initrd.gz images for netboot, and uses GRUB for DOS to chainload into it.
This is a great idea, but what makes it even better is that the official website for the installer is http://goodbye-microsoft.com. You just have to appreciate such a straight-forward sense of humor. The “Kind of” in the title is because it doesn’t actually install Debian from within Windows, but rather properly configures a boot loader so all you need to do is reboot and get underway.
Source: Debian Lists