As long as it isn't an assigned review, you can do this. As long as your friend starts her own account and reviews under her own screen name.
You said "the DVDs I have gotten from Eden" are these from the Porn Club? Or as assignments? I'm confused as to why you are getting DVDs you already own and have already reviewed. If they are push assignments and you already HAVE the DVD, you should turn it down.
If you bought it, and didn't use the Buy Out then it's fine to let a friend review it, under her own screen name and account. You can't let a friend write a review under your name, though.
I guess I'm not really sure what you are asking.