We are using Netrestore with a custom built post-action to install the LANDesk agent. You can put the agent into your image, but you have to delete the /Library/Preferences/com.landesk.uuid.plist file right before you create the image. Once the image is on a machine and it reboots a new UUID is automatically generated. Keep in mind though that if your LANDesk agent changes faster than your image updates you will have to completely rebuild your image each time - using a post-action means you just have to update that action and not the entire image. We use this same process for our antiVirus Software too.