Hi,
I have done that in the pass.
I have client that has one Application Server (APP1) that only is used to build packages. What they do:
1. Build a Full package a client and server package for APP1.
2. Once the package build is complete, deploy the package to APP1.
3. Copy the Path Code that you just built on the APP1 to your other servers. What they do is copy it to a different directory and once everyone is off the system, stop the oneworld services and rename the directories (path code). Then retart the services. It takes two minute to rename a directory so downtime is very little.
When you have an update package, you always do it to APP1 and repeat step 2.
Hope that helps.