If anyone has been following the re-encoding instructions, and finds that the disc they produce registers as a data disc, rather than an AVCHD, on a PS3, here is why and what to do.

Tsmuxer has undergone a change in the latest build. Now, instead of selecting blu ray as your output, you must select AVCHD.

If you have already muxed your streams together, just import the m2ts stream back into tsmuxer, make sure all the streams are checked, select AVCHD for your output, and start muxing as usual.

Then burn the BDMV and Certificate folders as usual, using imgburn, and making sure you select UDF 2.5. Cheers!