InfiniteMac OSx86 - IOHDIXController Error (Acer 3810tg)

Hi folks,
I wanted to use my spare time in this holidays to install Snow Leopard on an external drive for my Notebook but got the following error:

http://imgur.com/QnMWM.jpg

To sum it up:

Code:

hdik: attach failed: error 0000006b

Creating RAM Disk for /var/tmp

IOHDIXController::createDriveInKernel: returning error 0x6b

  ...

(repeats with another 2nd line a few times)

  ...

using 64-bit bootcache playlist

launch_msg(): Socket is not connected

launch_msg(): Socket is not connected

My system:
Acer Timeline 3810tg
Windows 7
Bios: v 1.10
External 100GB 2,5" HD
SL-DVD

What I did:
1) followed the lifehackers-guide
2) got a Kernel-Panic -> followed the instruction of some posts and deleted the "dsdt.aml" on my USB-thumbdrive
3) installed Snow Leopard on my external HD
4) restart
5) error above

I would be glad if someone could help me with this error. I really want to have my OSX:D
Greetz

ps: already googled a lot and tried insanelymac and this forum without success :-/