Joining MTS files

I have this video which come in as MTS files. I have been looking for software that I can join them together into a single HD video file so I can convert it to a more standard SD video (it is a SD TV program taped in HD. Since the film wasn't a recent TV program, it is just one of these SD program recorded in HD) Today, I finally found one, and it is called tsMuxeR from SmartLabs. I have successfully joint 90 MTS files into a single ts file, so I can use Handbrake to convert it into a MKV file.