I would like to add a note, that currently FAChart is not able to open replay files of FAF. Comment from Ze_Pilot:
You can't do that. fafreplay are base64 encoded and zipped. We have to write a "decode" tool in the lobby.
--Fiete F F 01:48, 1 August 2012 (CEST)
It is possible. The most recent replay viewed is in your cache directory (temp.scfareplay).