For exporting it should be something like:
fileReference := ('sunit.hermes') asFileReference.
fileName := fileReference fullName.
writer := HEBinaryReaderWriter new
stream: (File openForWriteFileNamed:fileName);
yourself.
oldPackage := RPackageOrganizer default packageNamed: #'SUnit-Core'.
hePackage := HEPackage for: oldPackage.
hePackage writeInto: writer.
writer stream flush.
And for installing back in the system just do:
fileReference := ('sunit.hermes') asFileReference.
filename := fileReference fullName.
reader := HEBinaryReaderWriter new
stream: (File openForReadFileNamed:filename);
yourself.
readPackage := HEPackage readFrom: reader.
installer := HEInstaller new.
installer installPackage: readPackage.