I was having some issues testing a Reiser4 custom Debian-Installer (d-i) into a VirtualBox 5.0.14/5.0.16 environment. Initially, I thought issues were due to older Reiser4 for Linux Kernel 4.4.0 Patch applied to Debian kernel 4.4.6-2. Notwithstanding, the installation succeeded after all.

Select the Reiser4-patched kernel from the Debian-Installer menu:

Include all available drivers:

Running dpkg on Reiser4-patched Debian Linux kernel:

Configure the package manager:

Select and install software:

Software selection:

Install the GRUB boot loader on a 'hard disk':

Install the GRUB boot loader to the master boot record?

Device for boot loader installation:

Force GRUB installation to the EFI removable media path?

Finish the installation:

Installation complete:

Make sure to remove the installation media:

Boot into newly installed Reiser4-enabled Debian system with Nanahuahuatl hostname: