Digital BW, The Print

Hello all,
after printing successfully on an Epson R285
with Ut3d and selfmade profiles, I switched to linux
last week because of a serious Windows 7 crash because
of a computervirus. I thought with my Icc-profiles gimp and gutenprint there should be no problem getting the same results as with Photoshop. Now Iḿ in trouble I can get the same results. In gutenprint there is even an option for MIS quad-and hextone printers. I would be glad if somebody can help me. I dont know if the problem lies in teh printerdrive Gutenprint or in applying the iccs in gimp. I think I m making something wrong there.

Marcus