Hi Dakotah,
If I understand correctly, you have multiple "leave a review" pages showing up in your SEOmoz reports, and each page is pretty much identical.
Yes, you are correct that you generally want to keep those pages out of the index.
Unfortunately, I don't believe Volusion is the most SEO friendly platform out of the box, and wrangling with it may require a bit of HTML knowledge
1. If you can access the source code, (using the LiveEdit function, perhaps?) it may serve you well to add a Meta NOINDEX tag to the head of your review template.
2. On the other hand, if this proves to technical, another option is parameter handling in Google Webmaster Tools. You'll need a verified Webmaster account for this. You'd want to find, or enter, the parameter that identifies the reviews, i.e."?ProductCode=" and set googlebot to NO URLs.
Both of these options are both advanced and potentially dangerous. Back up your work and keep records of everything in case you need to make changes, or get someone to help.
Hope this helps. Let us know if you need more info, or if we're headed in the right direction. (Full disclosure - not many SEOs work with Volusion, so my knowledge is extremely limited)