Full text body of a post in the RSS feed?

[hurry]

Greetings. How do I include the full text body of the post not just the name and some description in the RSS feed? Also is there any way to include say 400-500 characters of the post body in the feed items and tell them to read more... Thanks and eagerly awaiting some help.

[Eq4bits]

Would also like to be able to do this since i have a feed from one forum going to a webpage, right now it only lists the thread title and that's not even a link...=S

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Set my vB Options> External Data Feed and using the javascript on html page I am using the code below <script type="text/javascript" src="http://www.********.net/forums/external.php?forumid=141&type=js"></script>

<script type="text/javascript">
<!--
for (var i = 0; i < threads.length; i++)
{
document.write('<a href="http://www.*****.net/forums/showthread.php?t=' + threads[i]['threadid'] + '">' + threads[i]['title'] + '</a> <em>Posted on: ' + threads[i]['threaddate'] + ' at ' + threads[i]['threadtime']<br /> + [' '] + </em><br />');
}
//-->
</script>
The THREAD title, date posted, and time posted are displaying (the thread title being a link) seems like there would be something that could be added in that js section that would display the post content as well... any javascript people out there with any ideas?