This is as far as I get when I try to boot from Snow leopard 10.6.2 (Intel, AMD)

I press F12 to boot from CD. Then when Darwin/X86 appears I hit F8 to use customized boot options. Type in -V and this is what I get.

Loading Darwin/X86
Loading kernal Mach_kernal.
Loading hfs+ file: [Mach_kernal] from 4230480
Loading hfs+ file: [Mach_kernal] from 4230480
LoadDrivers: Loading from [system/Library/Extensions.mkext
Loading hfs+ file: [/system/library/extensions.mkext] from 4230480
Loading hfs+ file: [/system/library/extensions.mkext] from 4230480

Then it restarts... What should I do?

Specs:

Processor: AMD Phenom II 545 3.0 ghz dual core
Motherboard: Gigabyte 790GX UD3H
Ram: 4GB DDR3 a-data
VideoCard: ATI 4850

same here...

specs:

ACPI x64-based PC, Windows 7
Processor: DualCore AMD Athlon II X2 215, 2600 MHz
RAM: 4GB DDR2
Motherboard: Acer WMCP78M
Video: NVIDIA GeForce 9200

What distro release? What chipsets? BIOS setup?
Tough to help without enough info.