[Zope] Text insertion within a rendered textarea property

How would you perform this: I have dtml documents containing a body text as one of its properties. I need to insert html text (a table), provided by a method, within that text at the rendered page. I need the table to be placed at the beginning of the second paragraph of that text, or after a certain number of characters (whatever is more suitable to the page appeal). I'm just asking for advises, but code is welcomed as well. :) Thanks in advance, Ausum