Yeah the process should work well with both versions of call manager. There are a number of products out there that can help with the deployment, one I have used is from www.dominocomms.com.
Interestingly DominoComms have a product that can recover the PIN information when upgrading from ccm4 to something newer saving buckets of time and issues by the forced reset of the PIN when you upgrade. I've used it many times now and saved me 15+ man days of effort, happy days!