Field Names Row User Parameter in Microsoft Excel Reader

I would like to be able to make the Field Names Row (not Start Row) property in the Microsoft Excel Reader Parameters dialog a User Parameter so that users will be able to specify a different header row if the format of the Excel file is not entirely consistent.  This will ultimately be a published translation in FME Server. Is this possible or is there no way to make a parameter in that dialog a User Parameter?  Can anyone suggest a possible work around?  Thanks.