Can't "clean install" Snow Leopard

Hi guys.

I have a Mac Mini medio 2007 which is giving me trouble clean installing Snow Leopard.

It previous ran Lion but now I want a Clean install of Snow Leopard. I boot up on the disk and format the hard drive in disk utility. I'm verifying the disk and it says everything is okay.

I'm beginning the install and after 10-15 minutes it crashes with this picture..

https://dl.dropbox.com/u/17425103/IMG_1857.jpg

It's in danish and says something like "The installation program could not copy the necessary support-arhives" - "Please restart"

Please help..

Best regards

Yes, I've already tried that. I´m now reformatting by over-writing 7 times (FBI-recommended)..

I went to terminal og wrote diskutil list. I could see a lot of different stuff. Is that suppose to be there on a completely clean disk?