support for cetsEmbedRSS ?

I'm trying to make use of the tag-posts, post-indexer ala UMW Blogs suggestions.
Feed Wordpress looks great for creating tag-specifc feeds from the TagsBlog, I just can't see how to include this feed in my blog to see the results.
cetsEmbedRSS was suggested and the support link for that led here???
I don't get any feed to work with that.