title: Add zip files from one archive to another using command line
body: <p>I have two zip archives. Say, <code>set1</code> has 10 csv files created using Mac OS X 10.5.8 <code>compress</code> option, and <code>set2</code> has 4 csv files similarly created. I want to take the 4 files from zipped archive <code>set2</code> and add them to list of files in archive <code>set1</code>. Is there a way I can do that?</p>
  
  <p>I tried the following in Terminal:</p>
  
  <pre><code>zip set1.zip set2.zip
  </code></pre>
  
  <p>This adds the whole archive <code>set2.zip</code> to <code>set1.zip</code>, i.e., in <code>set1.zip</code> now I have:</p>
  
  <pre><code>file1.csv, file2.csv,..., file10.csv, set2.zip
  </code></pre>
  
  <p>What I instead want is:</p>
  
  <pre><code>file1.csv, file2.csv,..., file10.csv, file11.csv, ..., file14.csv
  </code></pre>
  
  <p>where, <code>set2.zip</code> is the archive containing <code>file11.csv, ..., file14.csv</code>.</p>
  
  <p>Thanks.</p>