Once again, you can install Win XP in a window using VMware. Even that it is installed on a x64 machine, it works as a regular x32 machine and the original x16 bootloader will work. You'll end up with a link to XP on your desktop, double click, then install all your Axon dev tools in it and you're done.
But this is only a hack, a true loader that works on x64 machines is still needed.