SgtBeans, unless you're using paint, you wont need it: in gimp and photoshop you can save as .tga without using a converter.
emaxxx, your post was made like last year but i guess i might still answer. By using a fake player folder he means you make a new folder under custom, name it something like "magixispoewrfullyawesome" and put your stuff in there. Then, when you go to toribash singleplayer, type /lp 0 magixispoewrfullyawesome and woala, you see the textures.
About the trails part, make sure they're named "trail_l_arm; trail_r_arm; trail_l_leg; trail_r_leg".