Code snippet to download the files along with versions from SPS 2003 document library.

    1:          private void Download()

    2:          {

    3:              string  siteUrl     = txtSite.Text.ToString();

    4:              string  source      = txtDocLib.Text.ToString();

    5:              string  downloadPath= txtDownload.Text.ToString();

    6:              byte[]  vContent    = null;

    7:              int     count       = 1;    

    8:   

    9:              using (SPSite site = new SPSite(siteUrl))

   10:              {

   11:                  using (SPWeb web = site.OpenWeb())

   12:                  {

   13:                      SPFolder sourceFolder = web.GetFolder(source);

   14:                      

   15:                      //fetching data from doc lib

   16:                      foreach (SPFile file in sourceFolder.Files)

   17:                      {

   18:                          //saving the main file

   19:                          byte[] data= file.OpenBinary();

   20:                          SaveFile(downloadPath + "\\" + file.Name, data);

   21:                        

   22:                          //saving each file's versions now

   23:   

   24:                          //resetting the counter of file names

   25:                          count = 1;

   26:                          SPFileVersionCollection vCol = file.Versions;

   27:                          for (int i = vCol.Count - 1; i >= 0; i--)

   28:                          {

   29:                              vContent = vCol[i].OpenBinary();

   30:                              SaveFile(downloadPath + "\\" + file.Name.Substring(0,file.Name.IndexOf(".")) + "-version"

   31:                                        + count.ToString() + file.Name.Substring(file.Name.IndexOf(".")), vContent);

   32:                              count++;

   33:                          }

   34:                      }

   35:                  }

   36:              }

   37:   

   38:              MessageBox.Show("Done!");

   39:          }

   40:   

   41:          //to save file on the local file system

   42:          private void SaveFile(string fileName, byte[] data)

   43:          {

   44:              try

   45:              {

   46:                  System.IO.FileStream fileStream = new System.IO.FileStream(fileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);

   47:                  fileStream.Write(data, 0, data.Length);

   48:                  fileStream.Close();

   49:              }

   50:              catch (Exception ex)

   51:              {

   52:                  MessageBox.Show("Exception : " + ex.ToString());

   53:              }

   54:          }

:: Please note that I would have just uploaded my initial code and you might want to consider proper optimization of the code and disposal of objects properly. I might not have updated the latest code here.