FILE####.CHK
http://mark0.net/soft-trid-e.html – (great program) Need to download small program(trid.exe) and database(triddefs.trd), and put them both in the same folder. (example: trid.exe e:\found.000\*.chk -ae) (-ae will change the file extension to the correct one)
http://www.ericphelps.com/uncheck/