So many (college) students 'jumped' on the MS offer of $29.00 for the upgrade to the 'new, improved' OS and downloaded it from 'Digital River'. However, the installation went a bit awry.
But, not to worry, here's the easy fix :

"From Download Squad:

So you're a student who has taken advantage of the crazy upgrade deal from win741.com but instead of looking at a nice, shiny ready-to-install ISO of Windows 7, Digital River sent you a handful of random files and no ISO! Fortunately, it's very easy to turn them into an installable ISO! Follow this very quick guide to get Windows 7 installing right away.

To start with, make sure your downloaded Windows 7 files (the 'expandedSetup' directory) is unzipped into C:\ — it'll make things easier later.

1. Download this tool — alternatively you can obtain the official pack from Microsoft, but that's a whole darn gigabyte.

2. Unzip and move oscdimg.exe to your System32 directory (likely to be C:\Windows\System32)

3. Open an elevated command prompt. In Vista you do this by typing 'cmd' into your 'Start Menu' and hitting ctrl+shift+enter. In XP, just type 'cmd' into the Run dialogue (Windows Key+R or from your Start Menu).

4. Type (or copy and paste) the following into your command prompt (this will vary a little, depending on where you've put your expandedSetup folder):

oscdimg.exe –u2 –b"C:\expandedSetup\boot\etfsboot.com" –h "C:\expandedSetup" C:\WIN7.ISO

5. Ta'da! You've got a burnable ISO!

All you need to finish the job is a good burning application like ImgBurn, CDBurnerXP, or InfraRecorder. For this particular task I'd recommend ImgBurn – then just right click the ISO file and start the burn from your context menu. Or launch ImgBurn and choose "write image file to disc" — your choice!

No DVD burner? If you have a 4GB USB flash drive handy, check out this app!"

LOL, talk about user friendly.

I don't see why they just didn't break an ISO down into .rar files that come back together into an ISO that even Disk Utility can burn. There's not even anything native on Windows to burn an ISO.

Is that a real set of instructions?

Love it!

You mean oscdimg.exe –u2 –b"C:\expandedSetup\boot\etfsboot.com" –h "C:\expandedSetup" C:\WIN7.ISO

Very real. Mister Natural slash instead of forward slash. To funny. Or not to funny. Not really the question.

Is that the real one? Yup, it is!

I keep a Parallels/Windows partition for one application only, Quicken WillMaker, so months ago when there was a special deal for an upgrade to W7, I took it. It arrived two days ago. W7 loaded alright, but I was unable to access the internet. Most of yesterday was spent on the phone with one idiot after another in MS tech support. Really! Those people are total illiterate morons. The last conversation was with a girl (several thousand miles west of the US from the accent) who informed me, "Microsoft does not support installations on a Macintosh computer. We have been instructed not to assist or cooperate with you in any manner." And the line went dead. How's that for customer service?

Ultimately, I solved the problem myself and got it all working correctly. I have no intention of trying to learn its bells and whistles. As long as that one program works that's all I care about.