control+t to apply the texture to the surface that you want it on. Then right click and select "texture"->"texture coordinates" (i think that's the menu option ... at any rate it's the first option). that should open a new window with 5 settings that you can change. the first two are the position of the texture. the second two are change the size of the texture and the last allows you to change the rotation (the angle that it is on the poly).