This question has been asked and answered in several different ways.
for answers see the following:
http://www.tfproject.org/tfp/showthr...=&threadid=901
http://www.tfproject.org/tfp/showthr...&threadid=2669
http://www.tfproject.org/tfp/showthr...&threadid=3163
By the way... I found these answers by going to the
search page and typing in the keywords "delete your posts". I suggest you try it sometime... it's fun.