To boot to the install ISO you will need to do the following:
1. From options page make sure your Boot Type is set to "Full Virtualization" (HVM)
2. Toggle the boot drive to cd-rom
3. To change media, a full shutdown (NOT a reboot) needs to be issued, then a start.
You can use the procedure to upload your own image in reverse to boot back to disk once installation is completed. You will want to configure VNC so you can VNC to the server to complete the installation, and use the network info assigned to you from the Networking Tab of our web ui.
You should also note that for our tools to function the following partition scheme needs to be maintained (replace sda with however your drive is represented)
/dev/sda1 /boot ext3
/dev/sda3 / ext3