Originally posted by Floris Dansen:
Your local OL office may be of help by optimizing your design and printing workflow - but be aware that extensive "how do I" questions are generally considered professional services.
Professional services are usually things like form and document designs, complex scripts, etc... Advices on optimizing forms is within the scope of a support issue and does not requires professional services.
That said, in this case, I believe pretty much everything has been said as far as setting up subset finishing goes. First try the driver-based method, and if it doesn't work, splitting the job will most likely work fine, albeit slower.
Regards,
Rapha