How to unpack XCP.DAT?

I updated my EFD utility to handle the packed XCP.DAT file. To extract files from the archive, use:
efd -x xcp.dat
in a clean directory. It will create files like xcp1.dat, xcp2.dat, etc. Unfortunately the file names are not present in the archive, that’s why the names are so meaningless.
Here is the utility: efd.zip