Commandos 2 no-cd(german) .TGZ promlem:(

I cant unzip .TGZ file i ve tried Winace,Winzip,Winrar, Zipmagic,Godemagic2000 and i allways get Error and that archive cant be open, i ve tried to rename Tgz to ace but it doesnt work too
HEEEEEEEEELLLLLLLP can u say me how to unzip or where to get normal(zip or rar etc) version of No-cd 4 Commandos 2