Can I load ReBarDxe with EFI Shell?

[rowanmoul]

I have a Dell PowerEdge R630 server that supports above 4G decoding already (at least that's what I interpret the "Memory Mapped I/O above 4GB" option to be).
Unfortunately flashing a custom BIOS that isn't signed by Dell is a no-go without de-soldering the BIOS chip and using an external programmer, which is what someone did for their R730 that is in the list of working motherboards.

Previously on this server I have used an EFI Shell script to use the load command to load NVME DXE drivers that I compiled from the EDK2 project so that I could boot off an NVME drive. It worked by loading the driver, triggering a re-enumeration of block devices, and then executing the default bootx64.efi binary from the NVME drive.

I was hoping I could do a similar thing here, but unfortunately when I ran load ReBarDxe.ffs it says the file "is not an image".
Is there a way I can re-package this file so that it can be loaded like this? Or is there a some deeper reason this wouldn't work even if I did? My knowledge of UEFI is surface deep at best.

[xCuri0]

No you can't because it functions by hooking UEFI PCI allocation which happen early during POST