Originally Posted by lunfai

Hello! Did you replace the mach_kernel file in the root of the installed Lion partition? If your machine reboots without showing any verbose (after kexts are loaded on screen and kicks into the system boot, your machine is either unsupported or your using wrong mach_kernel.

Try v5 or the one at the bottom (of the 5, the oldest one), but shouldn't make a difference. Charmeleon Wizard is a program you can get for Mac (Snow Leopard/Lion) that installs the latest version of Charmeleon (or update), with ease. It's a small application that downloads the latest trunk build and then even does the dirty work for you.

But, reading from that you need to replace mach_kernel. Open your Snow Leopard partition OR macdrive and replace the mach_kernel (it will be hidden, use showallfiles) on your Lion partition.