2.) [10.6] What do you need

You will need the following to successfully install Mac OS X 10.6:

• Mac OS X 10.6 "Snow Leopard" Installation DVD (the Upgrade DVD works fine)
• Access to a working Mac to restore the Install DVD to a HD
• A HardDisk to install "Snow Leopard" on it
• A cheap and bootable USB-Stick to install Chameleon on it
• Chameleon 2.0 RC3 (Link)
• some Kernel extensions and Chameleon support files (Link)
• a patched DSDT for your mainboard/BIOS-version
• Ubuntu LiveCD (Link)
• optional another free HardDisk/Partition/USB-Stick to restore the OS X Install DVD on it

You will also need a unique Hardware UUID. Wikipedia has more general info about UUIDs. The easiest way to make a UUID is to use the ethernet mac address of the onboard ethernet port of your mainboard. The Hardware UUID looks like this:

00000000-1008-1000-8000-001FD02E7359

My ethernet mac address is 00:1f:d0:2e:73:59. Replace the red part with your ethernet mac address. You can find it out using the Ubuntu LiveCD. Open a Terminal an issue the following command:

ubuntu@ubuntu:~$  ifconfig
eth0      Link encap:Ethernet  HWaddr 00:1f:d0:2e:73:59
         inet addr:192.168.1.103  Bcast:192.168.1.255  Mask:255.255.255.0
         inet6 addr: fe80::21f:d0ff:fe2e:7927/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:394 errors:0 dropped:0 overruns:0 frame:0
         TX packets:266 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:451298 (451.2 KB)  TX bytes:29571 (29.5 KB)
         Interrupt:251 Base address:0xe000

lo        Link encap:Local Loopback 
         inet addr:127.0.0.1  Mask:255.0.0.0
         inet6 addr: ::1/128 Scope:Host
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:4 errors:0 dropped:0 overruns:0 frame:0
         TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:240 (240.0 B)  TX bytes:240 (240.0 B)

Search the HWaddr for the interface eth0 (marked red). This is the ethernet mac address to use for the UUID.