Alternatively, you could convert them into a file format that the PS3 will play.
This site states the PS3 can play "AVCHD (.m2ts / .mts)" files. I remember researching that a year or so ago because I wanted to play some files on my Panasonic TV, but my recollection is that the AVCHD files that I had were in a different format/container/whatever it's called. I tried playing .VOB files on my PS3, and I recall it working, except that the PS3 didn't recognize the file structure and would only play one file at a time (instead of playing a whole movie).