I record live performances in AVCHD format, so I've long been used to the >4GB size limitation on MTS files. Vegas now has the Device Explorer to concatenate and copy MTS files, but for my purposes I prefer a little tool I wrote called MTSCopyCat.
Free download at http://www.knotless.com/cheap-tools.html
Tested on Panasonic and JVC. Should work for others, but if it doesn't just forward your playlist (MPL) file.
Free download at http://www.knotless.com/cheap-tools.html
Tested on Panasonic and JVC. Should work for others, but if it doesn't just forward your playlist (MPL) file.