The source code for ALSCRIPT is contained in a single directory. A makefile to build alscript, msf2blc and clus2blc is included. This makefile works OK on Sun and Silicon Graphics. You may need to make minor changes for your system.
There is a utility csh script called BUILD. Simply type BUILD sun to compile alscript on the Sun, BUILD sgi for Silicon Graphics or BUILD gcc for use with gcc compiler. See instructions in the file BUILD.
Once you have compiled the package, either add the alscript directory to your path, or link/copy the executables to /usr/local/bin or some other directory that is on most users paths.