Cope with a test epocroot that's not in $EPOCROOT/test/testepocroot
Don't delete mercurial repositories when cleaning!
rebuild tools
Copy the driver (filedisk.sys) to %systemroot%\system32\drivers\.
Optionally edit filedisk.reg for automatic/manually start and
number of devices.
Import filedisk.reg to the Registry.
Reboot.
Use the program filedisk.exe to mount/umount files, for an example
of use see the file example.txt.