I took it upon myself to make visual instructions, its alot easier to understand. 
  
  
ok start out with a clean WHITE background 
you foreground color should be black. 
and background color should be a dark green 
(I use #14B908, but u can use any NEON GREEN looking color, you want something bright) 
 
  
go to FILTER>Texture>GRAIN 
make sure grain type is VERTICAL 
intensity=100 
contrast=48 
 
  
next step we go to FILTER>artistic>NEON GLOW 
the GLOW COLOR should be something darker (I use #185403) 
glow size= -11 
glow brightness=34 
 
hit OK and 
SUPRISE...the matrix reveals its secrets before your very monitor   
then you just throw in some flashy letters a picture of Neo or something...and there you go. 
 
remember kids...when in doubt 
THINK WITH A BOSS MIND 
lol