dock.app folder missing

hi. i am trying to change the finder and trash icons and read a few posts on how to do it. People have written that we can find the icons for trash in the dock.app folder in Macintosh HD\system\library\coreservices\dock.app
i have looked and i can't find it. is there another place it mite be. i have mac os x 10.6.5 snow leopard. i just this 4 months ago. please any help on changing the icon will be appreciated.

thanks

 

found it

i just found them. didn't know i had to right click