Although this loader was initially created for use with Windows VirtualBox version, part of it can be used on Linux version as well.
Patching VirtualBox on Linux
https://www.kernelmode.info/forum/viewtopicd7bf.html?f=11&t=3478&start=100#p29030
More vboxmanage converted scripts examples
Example patched files for 5.1.16 deb package version
https://www.kernelmode.info/forum/viewtopic5ec6-2.html?f=11&t=3478&start=150#p29632