First create a template for 14.04 since it’s not an option:
TEMPLATE_UUID=`xe template-list name-label="Ubuntu Lucid Lynx 10.04 (64-bit)" params=uuid --minimal`
NEW_TEMPLATE_UUID=`xe vm-clone uuid=$TEMPLATE_UUID new-name-label="Ubuntu Trusty 14.04 (64-bit)"`
xe template-param-set other-config:default_template=true other-config:debian-release=trusty uuid=$NEW_TEMPLATE_UUID
With 6.2 SP1 and all the patches, it works out of the box.
The only thing left to do is to install Xen Tools with this command:
sudo dpkg -i /media/