Leopard 10.5.1 install issues

[kidkut]

Have loaded a leopard img of 10.5.1 to a usb drive using dd from Windows, cycles through darwin boot loader, brings up initial Apple grey screen and immediately reboots, my spec:

 

Windows: Windows XP5.1 (Build 2600) Service Pack 2

Internet Explorer: 6.0.2900.2180

Memory (RAM): 959 MB

CPU Info: Intel® Core2 CPU T7200 @ 2.00GHz

CPU Speed: 1993.2 MHz

Sound card: Realtek HD Audio output

Display Adapters: VIA Chrome9 HC IGP Family | VIA Chrome9 HC IGP Family | NetMeeting driver | RDPDD Chained DD

Screen Resolution: 1280 X 800 - 32 bit

Network: Network Present

Network Adapters: Atheros AR5006X Wireless Network Adapter - Packet Scheduler Miniport

CD / DVD Drives: D: TSSTcorpCD/DVDW SN-S082D | E: ROXIO DVD-ROM EMULATOR | G: WG6421H VWD920K

COM Ports: COM3

LPT Ports:

Mouse: 8 Button Wheel Mouse Present

Hard Disks: C: 109.1GB

Hard Disks - Free: C: 15.7GB

USB Controllers: 4 host controllers.

Firewire (1394): Not Detected

PCMCIA (Laptops): Not Installed

Manufacturer: Phoenix Technologies LTD

Product Make: Notebook PC

AC Power Status: OnLine

BIOS Info: AT/AT COMPATIBLE | 04/24/07 | evesha - 6040000

Time Zone: GMT Standard Time

Battery: High

Motherboard: MiTAC Notebook PC

Modem: HDAUDIO Soft Data Fax Modem with SmartCP

 

Am a complete novice to Mac o/s, any help much appreciated.