I was with you right up to the last command and I got this:

C:\WinPE_x64\media>MakeWinPEMedia /ISO C:\WinPE_x64 C:\temp\WinPE_x64.iso
Creating C:\temp\WinPE_x64.iso...
Scanning source tree (500 files in 123 directories) ERROR: Failed to create
"C:\temp\WinPE_x64.iso" file.

On Thu, Apr 20, 2017 at 2:58 PM, Andrew Raibeck <storman AT us.ibm DOT com> 
wrote:

> Hi Tom,
>
> I have it quite near the top of my to-do list to provide an update for
> Windows Server 2016. In the mean time...
>
> The main difference is in the steps used to put the backup-archive client
> code in the bootable ISO image, given that verbatim instructions we
> currently have work only with the pre-spinstall packages. Another change
> (improvement) is in the command used to create the ISO image, which can be
> used for both BIOS and UEFI based systems. You no longer need to build one
> image for UEFI and another for BIOS.
>
> The steps for restore are the same as for earlier versions of Windows.
>
> Preparation: Install and use the latest ADK from Microsoft. As I write
> this, the latest version is for Windows 10, version 1703. Go to
> https://www.microsoft.com and search on "windows assessment and deployment
> kit" (without the quotes). Once you have that in place, proceed with the
> step 1.
>
> 1. Extract the 8.1 backup-archive client package. For example, if you get
> the package from our download site, you can extract it to directory
> C:\download with this command:
>
>    8.1.0.0-TIV-TSMBAC-WinX64.exe -oC:\download
>
> The root of the install image is TSMClient, so that directory structure
> will be created in C:\download.
>
> 2. In the ADK Deployment command prompt, issue:
>
>    copype amd64 C:\WinPE_x64
>
> 3. Run this command to copy the client image to the WinPE media directory:
>
>    robocopy C:\download\TSMClient C:\WinPE_x64\media /e
>
> 4. cd into C:\WinPE_x64\media
>
> 5. Run this command:
>
>    dsmc-pe-x64 set
>
> 6. (optional) Clean up unneeded files:
>
>    del *.ini *.mst *.msi *.htm *.exe *.spd *.cmd
>
>    rd /s /q common64 commonappdata ibmspjvm issetupprerequisites system64
> win windows
>
> 7. Run this command to build the WinPE bootable ISO image:
>
>    MakeWinPEMedia /ISO C:\WinPE_x64 C:\WinPE_x64.iso
>
> Best regards,
>
> Andy
>
> ____________________________________________________________
> ________________
>
> Andrew Raibeck | IBM Spectrum Protect Level 3 | storman AT us.ibm DOT com
>
> IBM Tivoli Storage Manager links:
> Product support:
> https://www.ibm.com/support/entry/portal/product/tivoli/
> tivoli_storage_manager
>
> Online documentation:
> http://www.ibm.com/support/knowledgecenter/SSGSG7/
> landing/welcome_ssgsg7.html
>
> Product Wiki:
> https://www.ibm.com/developerworks/community/wikis/home/wiki/Tivoli%
> 20Storage%20Manager
>
> "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 2017-04-20
> 14:38:13:
>
> > From: Tom Alverson <tom.alverson AT GMAIL DOT COM>
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Date: 2017-04-20 14:39
> > Subject: BMR with Spectrum Protect 8.1 on Windows 2016 ??
> > Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> >
> > The only instructions I can find for BMR do not mention Server 2016 (see
> > link below).  Are there any updated instructions so I don't waste my time
> > trying this old procedure?  This says to make a Windows 8.1 boot disk?
> >
> > https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/
> > wiki/Tivoli%20Storage%20Manager/page/Best%20practices%20for%
> > 20Tivoli%20Storage%20Manager%20backup-archive%20client
> >
>