"Error Opening File:..." I would love to use the beta key i purchased.

The file download can be disrupted by your ISP, or a firewall or virus scan - Try dissabling any of these while you patch. It may also be system related - If you're able to post system specs, we may be able to pinpoint something that will stop you playing?

I'd suggest downloading the game on a friend's PC if possible, and copying the content.ggpk file over - If it still doesn't run on your pc if you do this, we know that it's definitely something the pc is doing that is preventing the file being run.