Will the oem keys on coa's work with the download iso for win7 sp1?

I don't have much to add, but I'll try to make it more clear.
There are the links to download win 7 sp1 on the digital life site.
My question is this: If I want to use one of the iso's (burned to a dvd or usb drive)
to do a fresh install, is my coa oem key on my computer going to work with it?
I talked on the phone with someone from microsoft that told me the iso's are retail and that my oem
key will not work to activate them. I know that oem keys are different from retail, but I got turned on to
the page for the iso downloads, in light of wanting to reinstall, but not having an install medium.
The guy didn't seem to know english well enough to answer my other question for him.
Which is: will an initial release key activate an sp1 install?

So, the main question, are the downloadable iso files for windows 7 on this site, oem keyable? Or retail key only?
(are they oem iso's, or retail iso's?)

Thank you.

 

Thanks for the replies. A little confusing, I must say. Maybe that's the way m$ wants it. I don't know.
Anyhow, my thinking is this: I have a part time job fixing computer problems. I thought that these win 7 iso's might be a way that, in the
event a client needed/wanted a fresh install of win 7, I could do the reinstall and use the key that is on the sticker that came with their computer. Thereby avoiding them having to purchase a retail win 7.
I used to have a dell that had a win xp pro sp2 coa. I obtained an xp pro sp2 oem (specifically dell, even) cd and was able to reinstall xp pro sp2 by using the coa on the dell. This is the same type of scenario for which I was looking.
I just think it is ridiculous to have to pay for a win 7 key/retail dvd, if you have a legit install/coa and all that needs done is a fresh install.