I cant find imagex to restore factory.wim file

Hi

I managed to get the Factory.wim
and i want to restore it

i googled it and found that i need imagex to restore it
unforunetaly, i dont have imagex any where

i downloaded the Windows Automated Installation Kit

but it is not bootable!!


where can i get the imagex and how to use it.

help appreciated.
Thanks

you can download it from here