the event will triger for the changing of your own nick yes.
an example code to do what u ask might look like this:
on *:NICK: {
if (($nick == $me) && (guest* iswm $newnick)) {
.timer 2 1 nick $+($nick,$rand(0,9))
}
}
this wil triger when your nick gets changed to guestSOMETHING
the timer is to avoid geting the fast nickchange error that some servers use. the $+() statment is doing nothing more than adding a random number the the back of your nick as odds are your old one is now in use by nickserv. .. feel free to change that to something else if u like
note that this code may not work if you have anouther on nick event in your script somewhere that could posibly be halting operation before this one is read.
Cobra^