Need Woocommerce Help( Adding shipping fields)

Hey BHW I read a post on http://wcdocs.woothemes.com/snippet...out-fields-using-hooks-and-filters/#section-1 but I have no clue on what to do next. All I want to do is add a couple of shipping fields into my woocommerce checkout page and erase some of them. Can anyone please help me out really quick? Thanks

Which file do I edit in the theme editor to add and overwrite the fields?

Skype: megadethfanboy12

You can go there woothemes[dot]com,
I think you can get something .