Attempting to load drivers for the wrong CPU type will cause a small delay at best, or may cause the computer to crash at worst.
I've placed r EFInd's drivers in directories that are named to minimize this risk, but you should exercise care when copying driver files.
These are: images to the drive's individual partitions, the r EFInd ISO-9660 driver enables r EFInd to boot multiple Linux distributions' installers from the USB flash drive.
I can't promise this feature will work with all distributions, but it does work with some.
Chances are good that a few such drivers are available, unknown to me, and more may become available in the future.