window 8 installation with already using dual boot window 7 and ubuntu

view story

http://askubuntu.com – i am already using windows7 and ubuntu as a dual boot with EasyBCD software. now i have a another seperate drive for windows 8 installation. ( i try to directly installation in different drive but when PC is restart only window 7 and 8 is showing , no option for ubuntu ) Tell me the best way to install win 8 and also keep together with ubuntu and win 7 . (HowTos)