The issue is actually with Syslinux. Different BIOSes support different system calls, that's why when everything works on my end on my computers, it doesn't work for some people. I'm trying to easy my way into learning GRUB2 and BOOTMGR, and MediCat will slowly transition more and more away from Syslinux. Right now, I have the unreleased 17.10.03 working, where Mini Windows 10 and the Windows recovery discs are all selectable within the windows BOOTMGR menu. That's a huge step forward, now that I've learned how to use the commands and change the UUID numbers of the .wim files being called.