I'm kinda bummed there wasn't much interest with this post.  Not even a comment.  But, I've solved the issue since my original post so I'll share.

First, I upgraded the module to asp.net 2.0.  That was a bear, but eventually worked through all the little gotchas to get it right.  The file to edit is:
"\App_Code\Documents\DocumentsSettingsInfo.vb".

Once you are there see the following lines:

#Region "Private Members"
    Private _LocalResourceFile As String
    Private _ModuleId As Integer
    Private _ShowTitleLink As Boolean = True
    Private _SortOrder As String
        Private _DisplayColumns As String = _
          DocumentsDisplayColumnInfo.COLUMN_TITLE & ";true," & _
          DocumentsDisplayColumnInfo.COLUMN_OWNEDBY & ";false," & _
          DocumentsDisplayColumnInfo.COLUMN_CATEGORY & ";false," & _
          DocumentsDisplayColumnInfo.COLUMN_MODIFIEDDATE & ";true," & _
          DocumentsDisplayColumnInfo.COLUMN_SIZE & ";true," & _
          DocumentsDisplayColumnInfo.COLUMN_DOWNLOADLINK & ";true"

As you can see, I've already edited mine.  For the columns you wish to enable or disable as default just set to "true" (on) or "false" (off).  Make your changes, recompile and you should be golden.