There are quite a few youtube videos /watch?v=CllLGaDYrHMThis was probably one of the best nfc software around http://n10software.blogspot.com/2015/04/download-nfc-tools-pro-edition.html unfortunately the original developers have disappeared. I think you can find it around other sites as long as your firmware is low enough but be careful getting things that aren't from the source.
Also I may be able to give a hand here. Has anyone taken one of these apart yet? If so how much glue is on the tag? And by looking can you tell me if the solder joints are exposed or hidden? Specifically the memory chip section of the tag.