That's exactly the same error as mine! And I'm also booting the installation from a HD partition.
I'll try to burn a DVD and see what happens.

this is the screenshot, sorry for the painfull quality it's taken with my cellphone.



EDIT: you're right!!!! it passed that error, and then gave me another one, SAM Multimedia Error. I've checked and it's related to a bad DVD, so I'll try again, damned toast!

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CPU: AMD Athlon 64 3000+ @2.3Ghz - Motherboard: ASUS A8N-SLI nForce4 SLI - nForceLAN by eno - SuperNForceATA by Medevil - RAM:2 GB DDR 333Mhz Audio: ALC850 Video: XFX nVidia GeForce 8400GS 256Mb (0x06e4) QE & CI from Chameleon 2 RC4Ethernet: Realtek RTL 8139 Series (working out of the box) OS: Snow Leopard 10.6.4 (aryajuanda's guide) + Windows XP 64bits