need permission? may i change the skin ?

hello all,

i have planning to change my forum skin with hitskin,

my questions :
1. am i need permission from the author who creates skin in hitskin?
2. may i change that skin? eg. change header, icon, etc

1) Nopes, you can directly install the skin from hitskin.
2) Yes you can with your own images.
But if you want to modify their images to something else, then you might want to ask them first.

But if you want to modify their images to something else, then you might want to ask them first.

i dont't so understand with the italized word,
please explain me again... .

Well modify their images by writing your forum name over it & then saying its yours etc, you could just ask them can you write something or do some changes in the existing image or not.

ok,
thank you very much Sanket for your explanations to me,