Falko Timme has written step-by-step guide to run Virtual Box Virtual Machine through Virtual Box Remote Deskop Protocol on FowtoForge.
This guide explains how you can run virtual machines with Sun xVM VirtualBox 2.0 on a headless Ubuntu 8.04 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there’s no need for the VirtualBox GUI.
Please find the complete article here.
Credit for this post goes to Falko Timme.