Frankly speaking, it's the first and last time I provide a VE version for VirtualBox. Before of that, I supported VMware technology only and, besides it had no sound, just worked. VirtualBox gave only problems.
First, you have to "import" the appliance and not just run it inside virtualbox, or there are good chances it won't work at all. Second, depending on your version of VirtualBox client, you may have to disable DMA into AROS. This CUTS DOWN SPEED to a little fraction of the original speed when dealing with drive operations ==> it slows down AROS in a barely acceptable way. Third, you must remember to enable the vhardware virtualization layer if your physical processor supports it, or speed will be furthermore cut down. Fourth, and this is crazy, pointer sometimes get stuck in a invisible window, and you have to move it fester upside down, or leftside right, to free it from those un-existent boundaries.
Now I'm about to choosing either to turn back the VE version to VMware, or to kill it directly with the next Icaros point release. I don't see many motivations to keep alive an "already configured version for this or that virtual machine technology" when you can set up your one in few minutes without so much efforts. And, for people that don't want to install Icaros to the metal directly, there's always the embedded QEMU machine with the Live edition. But the VE experience with VirtualBox is over.