Hi Barney,
I use DFace see Aminet
http://aminet.net/search?query=DFace111DFace111.lha 1.11 util/arc 106 69K 1996-07-15 GUI to depack LHA,LZH,ZIP,DMS,RAR,ARJ,RUN
You will need the files "lha" "lzx" etc in your "C" Drawer, these are also found in Aminet.
Kind Regards, Michael
aka rockape