//timer 0 3600 /msg #chat $!read(c:\mIRC\stuff.txt)
Each time a $!identifier is parsed, one ! will go away.
Another solution is using $eval($read(c:\mIRC\stuff.txt),0)
In a script you can remove the // or / in front of commands, in an editbox use / if you do not want it's arguments parsed and // to parse them (like in a script)