This may help you when you get b0, boot0 and other errors get, and the installer won't help.
(Installer didn't work very well in my case)
1. Open the Terminal app
2. Use sudo -s to assume root privileges.
3. First get the partition / disk where your Mac partition is
CODE
diskutil list
You should see something like this:

4. In this tutorial is the Mac disk disk0s2
5. Extract the Chameleon archive and go back to the terminal.
6. Install boot0 to the MBR:
CODE
fdisk -f boot0 -u -y /dev/rdisk0
7. Install boot1h to the bootsector of your OS X partition:
CODE
dd if=boot1h of=/dev/rdisk0s2
8. Copy the ‘boot’ file to your root partition:
CODE
cp boot /
Or if it's not your current volume:
CODE
cp boot /Volumes/[volume name]
9. Now make we our partition active.
Our disk is disk0, so our code will be:
CODE
sudo fdisk -e /dev/disk0
f 2
write
y
exit
f 2
write
y
exit
It will look like:

---------------------------------------------------------------
For Chameleon 2.0 only
---------------------------------------------------------------
10. Copy Themes and smbios.plist to your Extra folder:
cp -R smbios.plist Themes /Extra
11. Finally add any kexts you wish to /Extra/Extensions like you usually would.
