Maybe someone could give me some feedback. Should I post this in the developers forum or read the documentation better...?
A really more comfortable way does not exist. But AFAIK the ant script supplied with the distro produces a *.bar-file which includes the process definition, the process image and form templates while classes are put in an extra .jar. Afterwards the .bar-file is deployed via the ant task and the .jar is copied to the right location.