Hi There
It seems like you are trying to match a raw file from one color space to another. If your software cannot reRIP the data into the color space and print you have a problem.
As you know SWOP is Short Run Web Offset Press and Sheetfed has a different gamut.
Try using the ISO coated profile from FOGRA I know that the US has different tolerances but try it. Use this as your target in your IGen and I think you will like what you see.
I have used it on HP Indigo and it works great.
http://www.prepressforums.com/module...ted_v2_eci.icc
Regards
NigelT