Hi,
Sorry for the delay on this one.For starters you might want to take a look at
KB51841 -it discusses the steps required to port a Deployment Server to new hardware.
In essence, all your computers and jobs are stored in the eXpress database. So at a minimum you'll need to install the new Deployment Server, attach the old database, and copy over any apps and image folders you have to equivalent locations on the new server.