MacBookPro9,1 has a different built. It comes with 10.7.3. AppStore 10.7.4 comes up with an error "This version of Mac OS X 10.7 cannot be installed on this computer." So I can 't create an instadmg image.
So back to square one. I now have to recreate NetBoot (yes I have tried adding MacBookPro9,1 string on the Netboot plist - still no go) and create an another build...
I have booted the laptop in target mode and captured the pristine (never booted) preinstalled OS with Composer and uploaded to Casper Admin. I now created another set just for these types.
Its a pain! Anyone agree :)