You could take a look at the StudioRIP, we can drive the Screen units, with a variety of interface options. The RIP it self is a very flexible client/server based system, with options for built in imposition/trapping/proofing/FM. The standard RIP includes Hybrid screen as standard. Cost of options such as trapping are very reasonable, cost for trapping usually a three figure sum, and the RIP it self is very inexpensive There is a free demo version available on the website, should you want to try it, and make up your own mind.
Regards,
Rolf