Look at existing monitors for an idea of the content for each area (although they are generally self-explanatory).  You can paste your code into the code block yourself or upload a file to one of the many free file hosters on the net (such as [[http://code.google.com/hosting/|Google Code]] or [[http://sourceforge.net|Sourceforge]]) and link to it.

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Add the following to the main monitor page (modify the respective info):

<file>
==== my monitor name ====
Summary

  * Download:      [[monitors:monitor|monitor]]
  * Author:        [[someuser@example.com|User Name]]
  * Compatible with: OS, lang
  * Last Update:   YYYY-MM-DD
\\
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</file>