How To Change Default Template Like This ?

[kawe]

this is my default templatehttp://i42.tinypic.com/1q48z6.jpgthen i want to change to this templatehttp://i43.tinypic.com/4silh4.jpgi dont want change all templatejust one template like that is possible ?what kind of template can i edit ?SHOWPOST ?FORUMHOMEor FORUMDISPLAY ?

[mmoore5553]

some of this would be postbit_legacy and other part would be forumdisplay. I am thinking level1 post and level 2 no post but i could be wrong and it will be the other two. i have experience it in both.