Is there any setting in mIRC to change the < > that are around the nicknames in the chatrooms or would I have to use some kind of a script to do it?

Script.

/help halting default text
/help on text
/help on notice

etc

on ^*:TEXT:*:#: {
echo $chan ( $+ $nick $+ ) $1- | haltdef
}

Is there anyway to do it to my nick too? It works on the others just not my own nick now.

yes.. TEXT is INPUT instead..

and on msg you shurly want to add a dot.. .msg the dot will make the input text hidden for you.. else it would be like:

(nick) text here
<nick> text here

but look how you text look to others, maybe start a clon and look when yo8u type somthing in the channel, i think you have to replace $1- with $2- .. else you will se your nick too..

(nick) nick text here

on *:INPUT:#:{
if ($left($1,1) == /) && ($1 != /me) { return $1- }
elseif ($1 == /me) { describe $active $2- }
else { .msg $active $1- | echo $active ( $+ $me $+ ) $1- }
haltdef
}