Is there more I can do with ASP:AdRotator NavigateUrl than just a standard link?

Question

I currently have a simple implementation of an AdRotator:

<asp:AdRotator
    ID="EHR_Banner"
    target="_blank"
    AdvertisementFile="img/banners/ads/ehr.xml"
    Runat="server" CssClass="adRotator"
    OnAdCreated="AdCreated_Event" />

On the site that it resides I have a third-party 'pop-up' window script, GreyBox. I use it to display images and some external links. If you look at the link, in order for it to function properly you must add rel="gb_page_fs[]" (or any of the other declarations, in this case I want a full screen overlay) to the link. Since the AdRotator gets this specified in the AdvertisementFile XML and it just accepts a URL (correct me if I am wrong), I am unsure of where to go from here.

Thanks in advanced!

EDIT

Well, apparently you can add the rel property to the AdRotator and it works just fine. Microsoft surprises me again!