I bought Raven Shield and Athena Sword on Direct 2 Drive and I successfully installed them running on windows 7 beta 7100 build. I am well above the system requirements and I am not running any CD Emulation software.
The error message I get is "Please insert the Raven Shield CD2" cannot locate the correct CD-ROM.
Ive read all the FAQ and theres nothing about a digital download giving this error.
This sounds similar to a re-issue of Raven Shield that UBI did a jewel case release with Best Buy and Target about a year ago.
The CD's were missing install files and there was absolutely no way anyone could install the game. Stay far away from any $9.99 bargain bin Raven Shield game unless it happens to be one of the original big box releases.
About all you can do is contact UBI technical support and plead your case. Hope you can get it sorted out dude.