Removing Appletalk

Hi, Everyone.

I am in a bit of a mess....and am not the most
proficient linux user (as you will probably notice
when reading this message).  

Someone hacked into my development server and
installed/started up appletalk.  I was actually
sitting in front of my computer when I noticed
it happening and it said "starting Appletalk"
or something similar.  

After Appletalk was started up, I was unable to
shutdown correctly -- it got hung up while 
going through shutdowns.  And, it won't start
again correctly.  When it is going through the
boot up scripts it hangs on the part before it
loads and checks the file system.  

I cannot find any instructions on how to uninstall
Appletalk -- or at least stop it from starting
at startup.  From a few random messages I've found
through google, etc... I think that it is 
conflicting with something else.  

This is not the first time that this has happened --
someone has done it to my computer several times
recently.  But, this is the first time I saw it 
happening and can at least diagnose what caused
everything to stop working.  

Any help would be greatly appreciated. 

Thank you,

Betsy