Q:
how do I unpack LHA archives?
A:
use lha.
in AROS the packers you are missing in C: or Development:bin currently are located at
extras:misc/aminet/c
which is not added to the paths to executables.
put this into s:startup-sequence or s:user-startup to add to the path:
path extras:misc/aminet/c add
then reboot or re-execute the startup file,
then use...
lha x
...to extract.