hi, im new here.  i've been wanting to try out punBB to see just how much better it is than phpBB.  i wanted to be able to let my visitors (the few) not have to worry about missing posts or anything so i asked mako for advice and he showed this,  which brings me to my questions.
(not a programmer so forgive any misplaced/misused terms...lol)
1.  where on my server do i execute the convertor?  do i just upload the folder to my servers public_html (root for my server ) directory and run that directory in my browser or does it have to be in my phpBB directory somewhere. 
2.  if i execute it in the root, then i get the following:

Page: _start (0)

Clearing tables...

Adding guest account
Error:
Unable to add Goust-user
(Go back)

MySQL error:
Table 'cpayk_punforums.punbb_users' doesn't exist

File: /home/cpayk/public_html/PhpBB Convertor/_start.php
Line: 40

reset

i know that the DB cpayk_punforums exists and that it has the .punbbn_users table.  im looking right at it (remember, im not a programmer so i just might be stupid).  as far as i can see, i'm entering the correct prefixes(which i kept default from install) and the db names are right.  my server account and pass are defintaly right.  i also got another error but that seemed to go away somehow.  off the top of my head, i think it was an insert error on line 22 of _start.php.  i don't know if anything i've so far is useful but i figured i'd give it a shot.