You can delete DSZ1109.ZIP after you read the docs/shareware agreement
written by the author I suppose.  The only file you really need from that
package is just DSZ.COM, but I had to include the whole thing since taking
that one file (dsz.com) only and not including the other files would be
a violation of the dsz shareware lisence or something like that.  Since
DSZ is copyrighted even though it is SHAREWARE.