Hi Curtis,
You can make a parameter that has a widget type of "file picker":

You can then drop that parameter into your panel and put a task on it so it runs when the file changes.
Here is a very short example panel that just outputs the file name when the user chooses it.
<abs contexttype="opengear" id="_top" keepalive="false" style="">
<meta>
<params>
<param access="1" maxlength="0" name="file" oid="file" type="STRING" value="" widget="file-picker"/>
</params>
</meta>
<param expand="true" height="37" left="90" oid="file" showlabel="false" top="54" width="536">
<task tasktype="ogscript">ogscript.debug("the file is now " + params.getValue("file",0));</task>
</param>
</abs>
You could just get the value of the file when the user clicks on "load" as well.
#DashBoard