IMovie HD Deleting Deleted Files


I went through and deleted all the clips in my project into the project trash. I then went into project trash and selected all the clips and clicked "delete selected clips" not knowing the empty trash was the one I wanted. I then went into the MAC trash and deleted the clips there. The problem is it never removed the files from my harddrive. How do I fix this or manaully delete these files?

thanks in advance