I don't have 2003 or earlier any more but you need a table with a field of datatype memo, and in the properties for the fields set the text format to rich text - if it is not availaible in 2003 you'll need to upgrade to 2007/10
Note that rich text changed after 2003 from RTF to HTML so you might get problems with the different formats
When viewing data in a form or report you will also need to make sure the control property is also set to rich text