I know your a newbie an all. But still ill try and make this as easy and as plain as possible
Goto the PHP Manual.
Look for File Upload Or Something Like that. Its like 10 of the subheadings down or something.
from there you should find something called copy();
that should help you there
or if safe mode on
use move_uploaded_file();
This isnt really hard at all. I remember doing this my first week of PHP. If you do find it hard though. PM me and ill try and find the basic script i made.