First, I use my hack method but it is not bootable. so i use unifail. 
  
in my hack progress, i don't know this point. 
  
"Extract myHack from the downloaded package and run it. Do not just run it from the DMG package" -> how could i do to extract and what's meaning? 
  
there is no step "Use my own" folder!! 
  
And, I would use dual boot with win7(it is installed as RAID 0 from dell, but it is bootable when i change AHCI). would i choose MBR or GUID? 
  
thanks