Note: I'm using a Nintendo DSi to post this, so I may not do a quick reply.
Recently, about two weeks ago, I decided I wanted to install Linux Mint (htp://linuxmint.org). I installed it, and it worked just fine.
After some time, I got a huge set of viruses from a fake IRC client, and it was nearly impossible to get rid of. I didn't have any system restore points, nor did I (still don't) have a Windows 7 Home Premium build 7601 installation disk. So, my only choice was to find a Windows 7 Home Premium build 7601 ISO file, (I don't have any disks with enough space) and extract it with 7-zip to run setup.exe. The system restarted a couple of times during a one-hour process, and the re-installation was complete.
With the virus set gone, I just realized that by re-installing Windows, I lost the modified BCD Store that had the information for booting into Linux Mint.
I was mad at myself for that, since I use that OS for the primary set of time I run my laptop.
Looking up on Google how to modify BCD files (didn't want to do the half-hour re-install, causing the loss of special files), I came across EasyBCD, made by NeoSmart Technologies. Testing it's easy-to-use BCD editing, I successfully got Linux Mint back in my BCD Store. But, then came my "curiosity".
Note: At this time, I had just learned about Windows Longhorn, the abandoned beta of Windows Vista.
I had just got my hands on a ISO copy for both Windows Longhorn and Windows Whistler (XP). Becoming intelligent with how to use EasyBCD, I successfully added the ISO for Windows Longhorn build 4039 installer to the BCD Store. I restarted my laptop, selected the installer in the OS selection menu, and it got up to the loading screen (which I thought looked nice), and then froze.
I restarted my laptop, booted into Windows, and opened EasyBCD. In the menu to add ISO entries, I chose to add Windows Whistler. (CONTINUED IN COMMENTS)