The file um5.5.1.tar.Z is a compressed tar file containing the Umoria 5.5.1 distribution. To transfer it, set the FTP to binary mode (type "binary"), get the file, and then type "zcat um5.5.1.tar.Z | tar xf -" to unpack the file. If you already have Umoria 5.5.0, you can get the files patch550-551.Z and new551.tar.Z and uncompress them. Apply patch550-551.Z as a patch, and unpack new551.tar.Z as a tar file as above. Also delete the files CHANGES.orig and source/generate.c.orig; these are backup files which were included in the 5.5.1 distribution by mistake. ***NEW*** patch551-552.Z NOTE -- Moria 5.5.1 needs the patch551.compile.patch to fix a minor compile time problem.