install atv on a blank hdd? neeeed help

hello,

my original apple tv hdd is broke. now i have a new blank hdd, the new atv flash software and nothing more! how do i get this work? here " http://www.trejan.com/projects/appletv/ " i downloaded
a 2.4 appletv dmg. but now?

thx for any help!

dennis from hamburg germany