I don't see anything that stands out to cause a problem. To save yourself some grief, you should first install it on a VM using something like VMWare Player or virtualbox. Then you can install it just as you would on your own system. If it works, exactly as intended, then you're good. After installing, make sure to test your settings by running "reagentc /info" in windows. It should list both the re and os image as enabled with associated partition info. It should be noted that the disk numbers are not always 0 in boot mode. A strange example would be when I boot to Windows 7 on this machine. It lists my 2nd disk as disk 0 and my first as disk 1.
I make a "recovery" folder on the root of DVD, and I put : Code: Dism /Export-Image /SourceImageFile:%~dp0..\sources\install.wim /SourceIndex:4 /DestinationImageFile:R:\Recovery\WindowsRE\install.wim /compress:none