Polls can only be added in the /manage section of the site.  Plone
doesn't have an option for developing DTML in it's interfaces.

To create a poll you must follow these steps:

1.  Add a question to /lib/questions.

  Each entry is a "," separated list of values.  The first value is
  the "SURVEY_KEY", a unique key which refers to the survey.  The
  second value is the "ANSWER_KEY", a unique key which refers to a
  particular answer inside the survey.  The third value is the
  associated text.

  The first row you add is the actual question you wish to ask.  The
  SURVEY_KEY (which should not be shared w/ any other poll) should
  equal the ANSWER_KEY in this case.  The third value is your
  question.  Make sure to always surround your entries in quotation
  marks.

  "s3", "s3", "What is your favourite colour?"

2.  Add poll choices to /lib/questions.

  Now you must actually add the choices.  Each choice must have an
  ANSWER_KEY which is not shared by any other option inside the poll.
  The SURVEY_KEY must be the same as the one used in step 1.  This 
  groups the answers to a particular question.  The third value is the
  actual text for the option.  Each answer and or question should be
  put on it's own line.

  "s3", "a1", "Orange"
  "s3", "a2", "Black"
  "s3", "a3", "Purple"
  "s3", "a4", "Red"

3.  Create a DTML-DOCUMENT in your particular directory.  The document should
look like this:

<dtml-var standard_html_header>
<h1>Quick Poll Survey</h1>
<dtml-var "lib.survey_draw(lib,'s3',1)">
<dtml-var standard_html_footer>

A quick explanation of each tag.

<dtml-var standard_html_header>
and
<dtml-var standard_html_footer>

both give the page the standard Plone look.

<h1>....</h1> is standard HTML

<dtml-var "lib.survey_draw(lib,'s3',1)">

  This calls the survey_draw Python script under /lib.  
  To quickly review the args:

  lib:  This sets the namespace to /lib so that when we look
  for the questions and results tables we will look for these
  objects under /lib and not under your current directory.

  's3':  This is the name of the survey.  The ' just tells Python
  that this is a string.

  1:  When a 1 is passed it will not just display results and will
  try (if the user is eligible) to offer the ability to vote.  If 
  you instead pass a 0 then it will never show the buttons for voting.