Hello Michael Webster,
Yes, Sitefinity supports its own UrlRewriter.
It's much easier to setup than the IIS one, and does the job perfectly. I suggest you taking a look in this webinar, which explains how it could be used - http://www.sitefinitywatch.com/blog/08-12-23/URL_Rewriting_with_Sitefinity_Webinar.aspx
Other than this, you could find more information about the setup in the Sitefinity User Manual, which you can download from here - http://www.sitefinity.com/documents/UserManual_3_7.pdf
I hope this helps!
All the best,
the Telerik team
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