Instead of altering the software you could trick it into thinking there are more people connected than there are
This is more complex but it doesn't need you to alter the forum software (which would require access to the host).
Simply requesting a page should make it think there is a guest. The problem lies in making it think there are multiple guests.
It's likely that guests are judged to be the same guest if they share an IP or a similar IP address.
So you need to connect from multiple IPs, thats a tad more tricky (unless you are going to bereak the law and I ain't helping you with that). Most forums will detect the IP of a proxy instead of you IP if you go via a proxy, especially if the proxy is stripping the details of who passed it traffic (anonymising proxies do this).
All you need is a big list of proxies and then do the following (in Bash on a Unix like system):
export http_proxy=http://myproxy.test
wget -O - http://www.myforum.com/ > /dev/null
repeat as desired, or you could build a list of proxies and then have a shell script loop through them. Might want to use a random delay.
Technically the forum would still only display the number of guests you have, but you would have generated s lot of extra guests.
Remember guest sessions probably expire so you need to repeat the entire process. But this could be written in a script with a time delay or invoked by a scheduler such as cron.
This kind of requires you to have a Unix style machine, it can probably be replicated on windows somehow. Possibly write an program. Do you know enough about HTTP to know how to send a query?
If you need to find some proxies you could try tor,. Not sure how you can force tor to switch to a new set of proxies though.
You could try setting NewCircuitPeriod and sleeping for that amount of seconds between connections.
I'm wrting this on the fly so it may not be correct
#! /bin/bash
http_proxy=http://127.0.0.1:8118
export http_proxy
minpause=31
maxpause=60
site=http://www.example.com/myforum/
while true ; do
# grab a copy of the page
wget -O - "$site" > /dev/null &
# now wait a bit
range=$(( $maxpause - $minpause + 1 ))
# get a number in that range
rn=$(( $RANDOM % range ))
delay=$(( $minpause + $rn ))
sleep "$delay"
done
Script will run for ever, Ctrl-C will kill it.
Assumes you have privoxy running on local host 8118.
Assumes tor's timeout is 30 seconds (the defualt) and waits at least that amount of time so the chain changes causing the output IP to change.
Will probably only add about 10 or 20 guests bofre the counter resets itself. If you can make tor use new routes quick lower the pause counts. If you find a way to make tor always use a new route you can make the delays much lower. Script will need altering for less than a second due to ho the random number generator works.
Can't guarantee it will actually work.