update README.AMD64 with instructions for ubuntu, gentoo and debian
update README.AMD64 with instructions for ubuntu, gentoo and debian

scriptzteam/pzs-ng,bioboy/pzs-ng,scriptzteam/pzs-ng,scriptzteam/pzs-ng,bioboy/pzs-ng,scriptzteam/pzs-ng,scriptzteam/pzs-ng,bioboy/pzs-ng,bioboy/pzs-ng,bioboy/pzs-ng