Zip-File.ps1

<#
.SYNOPSIS
    This script zips a particular file into an existing archive (zip file).
.DESCRIPTION
    For this script, c:\foo\test.zip must exist
    The script zips c:\test2.txt into c:\foo\test.zip
.NOTES
    File Name  : Zip-File.ps1
    Author     : Thomas Lee - tfl@psp.co.uk
    Requires   : PowerShell V2 CTP3
.LINK
    http://pshscripts.blogspot.co.uk/2008/07/zip-fileps1.html
.EXAMPLE
#>

##
# Start of Script
##

# Get shell object and check to see that file exists
$sh = new-object -com shell.application
$fl = get-childitem c:\foo\test.zip -Ea 0
if (!$fl)
 {
   'File does not exist - stopping'
   return
 }

# Get Zip File to zip into
$targetzip = $sh.namespace("C:\Foo\test.zip")   # where the item is to go

# Copy a file into this zip
$targetzip.copyhere("C:\foo\test.txt")

# Check it now exists
ls c:\foo\test.zip
# End of Script