 downloadable Returns checkFileSignature - if true then check the associated .sha1 to make sure it describes our file. checkFileSignature is useful to make sure a file wasn't externally modified by a hacker or a virus<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>filename</em>&nbsp;</td><td>the name of the file </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>checkFileSignature</em>&nbsp;</t