How To Use Proxy Foxy Rapidshare Multiple Downloads At A Time(best Answer 10 Points)?

Rapidshare multiple downloads at a time(best answer 10 points)? - how to use proxy foxy

I installed the Foxy Proxy does not know "to add to mozilla.but explain how IT.Can someone how to use or recommend use of me another way to download multiple files from rapidshare at a given time.