Digital BW, The Print

Well, I've got a complete set of the EZ inks on their way (both warm 
and neutral).  Unfortunately, they were on backorder, so I'll hafta 
wait a couple weeks.  Some questions to pass the time:

1: Are all 3 warm inks (cyan, yellow, etc) the same as each other?  
Same with neutral?  Perhaps the ink itself is the same, but 
the "chip" is different?

2: Paul mentioned swapping the blacks for matte versus glossy.  Is 
that a big issue?  He mentions a "nozzle check".  Is this a function 
of the C86?

3: Does anyone know of recipes to achieve particular tones with these 
inks.  Specifically, I'd like to approximate platinum prints with 
these inks.

4: Some folks talk about sprays on here.  I noticed in another 
current thread that sprays are even used for matte prints.  Any input 
for Hahnemule Photo Rag?

Thanks for all the input.  Looking forward to getting started.

Matt