Help with the drawer icons

Long story short: i have Samsung JB 4.1.2 rooted-deodexed and i want to change the icons. Is there any way i can do this? Most of the icons pack are for other launchers, not for TW. Can i change them "manually" without an installation pack? i am most interested on the drawer icons but i will not complain if i can change all of them...

thank you!