FormAPI download/upload

System

I am trying to allow a file to be downloaded for edit, then uploaded after edit, through a DCT. It seems to work in some cases, but it always opens the document twice - once in word and once in the browser. Is there any way to avoid this? I would prefer to avoid a CGI callout if I can get by without it. Any suggestions?

<container name="Word" combination="and" hide-name="t">
<item name="Download" colspan="4">
<label></label>
<text>
<cgi-callout label="Download" />
<default>-</default>
</text>
</item>
<item name="Upload">
<label></label>
<text>
<cgi-callout label="Upload" />
<default>-</default>
</text>
</item>
</container>

<script><![CDATA[

function download()
{
var parameters = new Object();
parameters.vpath = getDocument();
IWDatacapture.callServer( "/iw/webdesk/edit", parameters, true );
}

function upload()
{
var parameters = new Object();
parameters.vpath = getDocument();
IWDatacapture.callServer( "/iw/webdesk/upload", parameters, true );
}

IWEventRegistry.addItemHandler( "/Word/Download", "onCallout", download );
IWEventRegistry.addItemHandler( "/Word/Upload", "onCallout", upload );

IWDatacapture.getItem( "/Word/Download" ).setValue( "-" );
IWDatacapture.getItem( "/Word/Upload" ).setValue( "-" );

IWDatacapture.getItem( "/Word/Download" ).setReadOnly( true );
IWDatacapture.getItem( "/Word/Upload" ).setReadOnly( true );

]]></script>