Soory to jump into this thread so late, but I've been using @EXEC for everything fine, almost. I've been trying to move things to /programs0, but that's not seen until that partition is mounted, and I can't seem to mount it from @EXEC.

The error I get in the bootup serial log is:
hijack_do_execve: execve() failed, errno = 2
hijack_exec("mount -n /programs0"), rc=-2 (ERROR)

The actual config.ini line is:
;@EXEC_ONCE mount -n /programs0

After the empeg boots, I've no problem running that same command from the command line. Any ideas? Has anyone successfully mounted a partition using an EXEC command, or is that just something that can't be done?