Hi Everyone, I have a triple boot MSI Wind U100plus for about 10 months now. Thanks to Tonymac and the guides submitted by users in this forum (as well as insanelywind), I have just completed building my triple boot (Snow Leopard 10.6.6, Ubuntu 10.10, Windows 7) desktop. Desktop Specs Gigabyte GA H55M-USB3 + Core i7 870 4GB Kingston PC1333 DDR3 500GB WD HDD MSI GTX460 1GB OC Samsung XL2370 LED monitor Preparation 1) Buy a copy of Snow Leopard Retail 2) Download and burn iBoot CD (in OSX, use disk utilities to burn the image) 3) Download and copy combo update 10.6.6, MultiBeast, DSDT, Tonymac Nvidia driver into USB thumbdrive 4) Set the bios according to the instructions here. (Ref: http://tonymacx86.blogspot.com/2010/04/ ... -x-on.html) Essentially: a) Reload "Optimised defaults" in BIOS. b) Set all available options to AHCI c) set HPET to 64-bit Versions Used: iBoot 2.6.3 MultiBeast 3.2 Snow Leopard Retail 10.6 Mac OS X 1) Boot with iBoot 2) Remove iBoot and insert Snow Leopard Retail Install disk 3) Press "F5" to refresh and select to start Snow Leopard installation disk 4) Start Disk Utility 5) Partition HDD to 3 partitions (Partition 1 = Mac EXT with Journal > Label volumes as "Mac") (Partition 2 = Win FAT32 > Label volume as "Linux") (Partition 3 = Win FAT32 > Label volume as "Windows") 6) Quit Disk Utility 7) Install into "Mac" Volume 8) Once installation is completed, insert iBoot CD and reboot 9) At bootloader, select "Mac" Volume to get into the newly installed Snow Leopard 10) Copy files from thumbdrive to desktop 11) Install combo update 10.6.6 but do not reboot 12) Ensure DSDT is on desktop (in my case "DSDT-GA-H55M-USB3-F11.aml") 13) Run MultiBeast multibeast.png 14) Remove iBoot CD, Reboot and Chameleon bootloader should start 15) Install Tonymac Nvidia driver (HDMI video worked perfectly) Now proceed to install Windows 7 Windows 7 1) Boot into Mac OS X 2) Launch Terminal (i.e. Applications>Utilities>Terminal) 3) Inside Terminal type "sudo fdisk -e /dev/disk0" 3a) type "p" to list partitions 3b) type "f 4" to mark partition 4 as active 3c) type "w" to write changes to boot record 3d) type "y" to confirm that reboot is required for effect to take place 3e) type "exit" 4) Restart system and boot from Windows Installation Disk 5) Open command by using (shift-F10) 6) Inside Command type "diskpart" 6a) type "select disk 0" to select the boot disk 6b) type "list part" to list partitions 6c) type "select part 4" to selection partition 4 6d) type "active" to set partition 4 as active 6e) type "exit" 7) Proceed to custom install and select partition 4 for installation 8) Once installation completes, it will reboot into Windows 7 Now proceed to install Ubuntu 10.10 Ubuntu 10.10 1) Boot Ubuntu Live CD 2) Choose Install (do not need to run the OS in the Live CD) 3) Choose Custom Install 4) Select /dev/sda3 as install location 5) Select /dev/sda3 as bootloader (i.e. Grud) location 6) proceed to install 7) Complete installation and restart machine (To get graphics working properly, go to Accessories>Appearance>choose "extra" button to install graphic drivers......... you can do this anytime after you get the Chameleon Bootloader back) **In case you did not insert the iBoot CD into the machine during reboot, it will report a missing operating system. Now to get back the Chameleon Bootloader 1) Boot with iBoot and select Mac OS X and it will boot into Snow Leopard 2) Launch Terminal (i.e. Applications>Utilities>Terminal) 3) Inside Terminal type "sudo fdisk -e /dev/disk0" 3a) type "p" to list partitions 3b) type "f 1" to mark partition 1 as active 3c) type "w" to write changes to boot record 3d) type "y" to confirm that reboot is required for effect to take place 3e) type "exit" 4) Launch MultiBeast 5) select to install chameleon bootloader 6) finish and restart After this, the system will boot into Chameleon, and you will be able to choose between stating Mac, Ubuntu or Windows 7. It may also be useful to sync MBT and GPT 1) Go into Ubuntu and install gptsync (using synaptic) 2) go terminal 3) sudo gptsync /dev/sda 4) Reboot Hope this is helpful. *This guide should work for dual boot as well. All that is needed is to change the partition information accordingly.