[Scribus] rgb to cymk question

[Gracia M. Littauer]

last 2 years I went a  quick copy shop to print 200 color calendars. 
They used my rgb photos that fixed somewhat with Photoshop. 

This year, new graphics guy & new copier; the pix are HORRORABLE! He 
said the Xerox Ducocolor 12 prints CYMK & my pix are RGB, and they're 
not able to change some setting of copier that would help. Of course he 
could make them cymk in PHshop.

So 2 questions...
1) does this copier really print CYMK, or am I being 'had' &
2) if they do, why did some of the pix come out great & some really bad 
& how can I 'proof' my cymk photoshop or gimp files since my epson 
stylist 3000 is rgb? 

-- 
Gracia...Cooleemee, NC   Registered Linux user #263390 - SuSE 9.1 Pro
Only two things are infinite, the universe and human stupidity, and I'm 
not sure about the former.  Albert Einstein