inlude css

i created Connorhd's mini portal script just including the news which is his Step 2
http://punbb.org/forums/viewtopic.php?id=7051

i included that file in my index here
http://www.pro.trap17.com/psp/

i am wondering how i can use the css for my board which is oxygen to show up on my index here http://www.pro.trap17.com/psp/

and i have another question

what variables do i need so i dont have to use the header
cuz i dont want the Title, and the links to show up in the news