tftp-server and tftp_remap

I am trying to pxe boot Windows PE on my network. I already have a (Windows) DHCP server and an RHEL TFTP server that works fine for pxe booting RHEL/Rocky/Alma, etc, but when I try to boot Windows PE I am getting a BCD error. I am pretty sure this is down to the fact that the paths that Windows needs have backslashes and obviously Linux uses forward slashes.

Now, there are articles all over the internet that suggest I can use "tftp_remap" to overcome this, but they all refer to tftpd-hpa, rather than tftp-server, which I have installed. It appears that tftpd-hpa is not available for RHEL via dnf, or is it?

Does tftp-server (tftp-5.2-40.el9.src.rpm) support tftp_remap?
Does anyone have any idea how I can implement this if it does?

Thanks