Datacolor User to User Support Group.

What is the workflow for profiling and printing with PrintFix Pro 
2.0 and Epson 2400 or 3800?  

     I already have a good profile for color work.  I have made another 
profile adding extended greys.  
     1. If I want to print B&W using the K3 inks, do I need to print 
with the color driver and the new profile or can I somehow incorporate 
into my workflow the Advanced B&W feature of the 2400 or 3800?  
     2. If I need to use the color driver with the new profiles and 
forgo the benefits of the Advanced B&W features, how does 
the "neutrality" compare to using the Advanced B&W features? 
      
Thanks,
Matthew Kraus