I have same problem on my 1005h (n280)

I have 5 partitions.
1) default 4gb for windows restore
2) system partition
3) for windws xp partition 70gb
4) partition for windows 7 40gb
5) partition created under windows 7 30gb for mac os

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I'm try to make usb bootable iatkov v7 and IPC 10.5.6 with no results.
Under Mac OS, formated my 2 usb flash (4, 8gb) in GUID and MBR.
After that restored mac os image on it.
Installed from osx86tools PC_EFI 8.
On flash with GUID i have error whn loading like:
boot0 : GPK
boot0: checking
boot0: done
boot0: HFS+ partition error

On flash with MBR , have loading osx86 ... and after 3 seconds laptop restart.

After PC_EFI 9 installation on GUID usb i have same problem.. after 3 second laptop restarts.

From windows XP:
formated usb flash under windows xp ... windows 7... hp usb tools, FAT32
Loaded ISO filewith leopard hd installer helper v0.3
When loading from usb nothing happens.

Tried external HDD(160gb), deleted partition under windows 7... created one 20gb primary... formated fat32... used leopard helper... nothing...

Updated bios to 1102 same,...