Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!apple!netcom!wasilko
From: wasilko@netcom.UUCP (Jeff Wasilko)
Newsgroups: comp.sys.mac
Subject: Re: Combining/Separating files.
Keywords: combine, separate
Message-ID: <3603@netcom.UUCP>
Date: 31 Oct 89 03:43:20 GMT
References: <356@sierra.stanford.edu>
Reply-To: wasilko@netcom.UUCP (Jeff Wasilko)
Organization: NetCom- The Bay Area's Public Access Unix System {408 997-9175 guest}
Lines: 2

Try Tar for the mac. It will allow you to create Unix Tar files.
It also allows you to extract files from a Unix tar file.