there are two things ive experimented with and done, Ultimate Nudger, and msn crasher.
the ultimate nudger is all memory, and the crash program is all packet.
i will show you how to make a msn crasher through WPE Pro (winsock packet editor)
Step 1
Download WPE
Step 2
locate your victim
Step 3
Start wpe and target msg messanger
Step 4
send him a fairly long message like SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-SPAM_spam-
(note this will fit perfect in a msn post)
Step 5
click stop on wpe pro
step 6
locate the large packet you sent him, it should be easy to find, just look for the large packet size in the window that pops up.
step 7
right click the packet that you located in step 6 and click "send"
step 9 (im a little tired and cranky so i told step 8 to F*** off and i wanted this to be a 10 step tut)
where it says continuously (under send) click that and change the timer to say 100 milliseconds
Step 10
Hit play and your target will log off, it may not appear like he did, but wait a min or so and he will log back on.
(i usuly leave it running for about 20 seconds to make sure)
I found this out when i was playing with WPE, trying to learn how to send messages without typing. i bet its out there on the net somewhere but i decided to write my own and not bother to look anywhere else.
if anyone wants me to post a "noob proof" tutorial on msn nudger just post here. its really simple, basicly just search for on/off values (1 and 0) search for 1, send a nudge and before the delay is up search for 0. you may need to try a few times because sometimes the value spikes up to really high to throw off some searches.