well im just trying to start mapping so i d/led radiant and all, but, where the hell do i have to put the textures directory to make them be selectable from Textures menu at radiant?

I don't uderstand the question...do you think how you get the textures? If yes, go to "textures" -> select one, for exemple "rift", then the radiant loead it, press "T", select the brush and put the texture on it ;)
Oh and something important: If you don't see the textures, you selected the wrong path for JK, it have to be the path to you GAMEDATA directory.

aah, the path!!! grrgrrr, well reinstalling ;)