@mpgxsvcd "The easiest lossless cutter and joiner out there is AVS Video remaker. It will do a lossless cut and join for the MTS files. It is about $60 and comes with the very full features AVS video editor. "
Have you looked at the output though? It's not very good. I took a non-hacked mts file and cut a few seconds out of it. Lots of artifacting when the scene changes with AVS Video Remaker.