Jermiah, not much to describe. Just run the preview in the editor and if at some places there is tripod left, go to the right photo and place a red marker on it. A thin one if you are working with single photos, a fat one if you are using stacks. Actually I always use the fat one as it also works on single photos ;-)http://www.autopano.net/wiki-en/action/view/Autopano_Giga_-_Panorama_Editor_-_Masking_tool
If that does not work, how many photos have the nadir insight?
Let me add that this tool in most of the cases works fine! It works best if you not only mark what you want to get rid of - but also what you want to keep.
So when you have an object to rermove and in the next image a prt of background where this object is in the other image - placing a green mark on the background to keep
helps making the removal almost perfect usually.
ThatÂ´s quite a different way from the masking-tool in PTGui - but it works very good nevertheless when you get used to it.