From MorphOS Library
From the original xadmaster.library manual:
Exe2Arc - extracts the archive data from self extracting archive files.
FROM - specifies the exe file archive that should be handled. TO - is the name of destination archive file. This is automatically created, if not given. It also maybe the name of a directory, where the file should be stored. TYPE - allows to specify the archive type (if known). You always need to specify the TYPE keyword. The type may be specified using the archive format extension or the type name displayed, when archives are found.
Shell> exe2arc pk204g.exe