Probably already answered elsewhere but just to confirm..

It does work if you replace a file on the installation media. I restored the Snow Leopard DVD to an external drive and booted off that (USB HDD). You will still need extra stuff to get it working, like FakeSMC, maybe legacy kernel, Chameleon, etc (MultiBeast?)


http://www.kexts.com/view/224-osinst..._installs.html

A copy/paste from there:

This is used to enable installation of Mac OS X 10.6 Snow Leopard on an MBR-formatted volume. Useful for installing OSX in a disk with an existing Windows installation.
How to install.
1. Copy the entire contents of the Mac OS X Install DVD to a USB stick/drive.
2. Navigate to /System/Library/PrivateFrameworks/Install.framework/Frameworks/OSInstall.framework/Versions/A/
3. Replace the file "OSInstall" with the one from this archive. Make sure the permissions are the same as in the original. (You don't have to delete the original OSInstall if you want to keep it for safety reasons. Just rename it.)
4. Install Mac OS X from this USB stick/drive.