This process was discovered researching how to Zen a Boot Camp partition. Those instructions can be found here.
One of the concerns when trying to deploy a Zen image is the HAL. Our base image has a standard single processor ACPI. However some of our new machines are dual-core, and as such need the ACPI updated. Corey Webb, our Zen guru, created an add-on image to swap out this ACPI to Multiprocessor. I stumbled across this when I was having an issue with an IBM T60 that wouldn’t wake from sleep. Thinking this might help our success with imaging the Intel Macs I applied the add-on and was met with great success.
Taking this one step further, I noticed that my Parallels VM of just a standard Windows XP install had a ‘Standard PC” HAL. I asked Corey to create an add-on image that would swap out the HAL with ‘Standard PC’. That’s it!
Just boot your VM off the zen imaging CD, pull down your base image and an add-on to replace the HAL. You’re done. Once you’re up and running you can send ctrl+alt+del to login from the VM menu in Parallels. After installing the Parallels Tools (an MSI that could be deployed to the maching via Zenworks) you can press (in this order, holding each one until they are all depressed) alt then ctrl then fn then delete.