Just to follow up with what everyone else has been suggesting:
1. My download, including the "setup1.box, setup2.box, and Windows 7-P-Retail-en-us-x64.exe" files all came through fine.
2. The files extracted without error to the "expandedSetup" folder wihtout error as well. I'm sorry I cannot help anyone having that particular problem.
3. To creat the .iso file, download The Windows® Automated Installation Kit (AIK) for Windows® 7:
http://www.microsoft.com/DOWNLOADS/d...displaylang=en
4. Once installed, use the "Deployment Tools Command Prompt" tool and enter the following text at the prompt, changing the USERNAME to your username and change the file locations if necessary. For this example, my expandedSetup folder files are on my desktop and I want the program to create the .iso file on my desktop as well:
oscdimg -bC:\Users\USERNAME\Desktop\expandedSetup\boot\etfsboot.com -h -u2 -m -lWIN_EN_DVD C:\Users\USERNAME\Desktop\expandedSetup\ C:\Users\USERNAME\Desktop\7.iso
5. I just completed this and the .iso seems to be working fine. I will follow-up if anything doesn't work out.
Good luck!