You can do something like this but it will be a little custom. The idea is that you add in a form with the radio group and submit button on the index page of the gallery you are working with.
Once you add in the form though you will need to do some customizing of the css to get it looking correctly. When I did this as a test I found that I had to widen the area around the large image to accommodate the form, then I had to alter the margin setting for the large image to get the form to show completely.
Here is the form that I added to the ribbon_fullsize > index.php page in the fullsize div:
rate this image
<form name="form1" id="form1" method="post" action="">
<input type="radio" name="radio1" id="radio1_0" value="1" />1<br/>
<input type="radio" name="radio1" id="radio1_1" value="2" />2<br/>
<input type="submit" name="submit1" id="submit1" />
</form>
I then adjusted the width of the large image area with this css:
.pg-rf .fullsize {
width: 782px;
}
I also adjusted the margin-left of the image itself to allow the form to fit:
<img src="http://yoursite/powergallery/images/1/sample01_782p.jpg" alt="" style="visibility: visible; opacity: 1; display: block; margin-top: 0px; margin-left: 31px;"/>
This got the form on the page but it did not look all that good. You will need to do some work with the css to get the form looking nice. Once you have the form on the page you can have it submit to another page with an insert statement on it to store the results into your db.
