Don't use it thought, people problems with those devices..

If you want a good MD for around the same price get a MSI media live, you'll be happy you did.

I'm not sure why you are getting these but my recommendation is to install using the DVD (not the dual layer)

Have you upgraded to the latest nvidia drivers?  a 8500 should be more than enough.
also, check this out and compare it with your xorg.conf
http://pastebin.ca/976853

Here's the spread sheet that Barry made that has mapped out most of the scripts.
http://svn.charonmedia.org/svn/branches/scripting-branch/script-data.ods

I've updated one or two things so far.   Mainly been trying to read them and understand them.  I'm still trying to learn bash