To merge two excel files...

1. Create empty scoring workbook
2. Select Tools > Share Workbook.
      Check box "Allow changes by more than one user..."
      Advanced - set number of days in history
      Set "check for updates" to every 5 minutes
3. Create copies of this to distribute to scorers
4. Create copy to be used to merge all the files back together.

When completed
1. Each scorer should save their file
2. Put all files in the same folder as the copy created in #4
3. Open the copy created in #4
4. Select Tools > Compare and Merge workbooks
      Select (using cntrl click) all the files returned by the scorers
5. Copy the values (using paste special) into the main score spreadsheet 
(the one with the awards/results tab)

By doing it this way, the scorer files are not changed. We can therefore
still go back to them if we need to.