Install Windows 7 in Mid-2015 Macbook Pro

Would I need to do anything to the Hybrid MBR we created? And, if I use disk utility to re-partition the drive back to one partition and erase the drive back to one HFS+ volume for re-installation of Yosemite would that destroy the Hybrid MBR and put things back to Apple's default?

Does anything have to be done to the Hybrid MBR before attempting to install the clone image of Windows 7 onto the FAT partition?

I haven't made it yet so if there is a certain way you recommend I will follow that. But my plan is to use my friends 2011 Macbook Pro. I was going to use Bootcamp to download drivers to a USB and then have it make a Bootcamp partition and use the Windows 7 64 bit install disk I have since his 2011 has an optical drive. After installing all the updates to Windows 7 I was going to:

1.) Run sysprep /generalize /oobe

2.) At boot-up use a CloneZilla Live on USB thumb drive to make a clone of the Bootcamp partition on 2011 Macbook Pro

3.) Use CloneZilla Live on USB thumb drive to copy clone to FAT partition on 2015 Macbook Pro

I was going to buy WinClone Standard just to make things easy but I was reading their support documents and it looks like cloning isn't going to work either on a 2015 macbook Pro if the image comes from a 2011 Macbook Pro. Do you think I am reading the link below correctly?

https://twocanoes.zendesk.com/hc/en-us/articles/204433039-Winclone-Image-Compati bility-with-512b-and-4K-Block-Size-on-20…

https://twocanoes.zendesk.com/hc/en-us/articles/204433039-Winclone-Image-Compati bility-with-512b-and-4K-Block-Size-on-20…

The weird thing is I have a 2015 Macbook Pro and when I ran the command they did in the article mine shows:

MacBook-Pro-2:~ cb$ diskutil info / | grep "Block Size"

Device Block Size: 512 Bytes

Allocation Block Size: 4096 Bytes

So maybe it would still work?

I successfully followed Winclone's guides for migrating a Bootcamp partition and brought the Windows 7 64 bit Partition from my 2011 Macbook Pro to the 2015 Macbook Pro. Since Windows 7 doesn't support EFI booting though I used Parallels to boot into the bootcamp partition, activated Windows 7, then upgraded to Windows 10 using the Windows 10 Upgrade tool. I booted back into MacOS and noticed even with Windows 10 installed on the partition it wouldn't show Windows on the ALT/Option menu. So I selected the bootcamp partition in Winclone and used the "Make EFI bootable" tool. After that I rebooted and in the ALT/Option menu is "Windows" now and "Mac OS." But when I click on the "Windows" partition it switches to a black screen. I waited for ten minutes and finally hit a key and it booted back into the OS X partition. I thought maybe it was a display driver thing so I installed the bootcamp drivers using Parallels to get back into the bootcamp partition. I'm at a loss to know whats going on now....

I felt like the issue had something to do with the hybrid MBR we created so I wiped and re-partitioned the disk and re-installed Mac OS X. Then I created a FAT partition with disk utility as it instructs in the Winclone guides. I put my saved image back on and of course the Windows 10 wasn't activated any longer because of a hardware change. So I put the image of Windows 7 right before upgrading to Win 10 back on the BOOTCAMP partition and re-upgraded (using Parallels to access the Win7 bootcamp partition) from Windows 7 (activated) to Win 10 (activated). After the upgrade I selected System Prefences-->Startup Disk and it has windows so I selected it and hit restart and it successfully restarted NOT into a black screen but instead a blue screen lol.

Of course, none of the start-up options (F8) make it boot-up either.