Game Won't Install.

Hi All,

I downloaded this fantastic looking game- can't believe it is free!

However, I have ran into some problems. When I run the setup application, I get the following error.

C:\Users\Steve\AppData\Local\Temp\Temp1_darkest_dawn_setup.zip\Disk0002.tiz

Error 2 while opening this file:
The system can not find the file specified.

I have tried it several times, with the same result. It gets to about 15% and then this happens. I'm looking to install it into my D drive, and its downloaded on my C. Don't think this would be it, but I thought I'd mention it.

Specs:
Windows 7 64bit
AMD Phenom II x4 840 3.2ghz
8 gig DDR3
570gtx

Many thanks!