ISPconfig webhosting appliance (Ubuntu server 9.04 32-bit, ISPconfig 3.0.1.4)

[VMTN_Admin]

http://www.vmware.com/appliances/directory/node/324933

[bitbox]

How can I expand the disk size? 4.7 GB fit on a DVD, very nice, but useless for productivity use. I cannot change the disk size even when the VM is powered down. I'm using VMVare vSphere Client 4.0.0