Soft proof profiles are used to simulate the final output from a specific printer on a specific paper type. The soft proof profile that we supply is for the Fuji Crystal Archive Color Paper only.
DO NOT EMBED THE PROFILE IN YOUR IMAGES. All image files should have either a sRGB or Adobe 1998 color profile embeded in them. We will color manage from those color spaces through our output devices.
The accuracy of a soft proof profile also depends upon the quality of monitor you are using, the accuracy of the monitor calibration you have done, as well as any ambient lighting in your environment.
The following information is provided from Adobe with directions on how to use a soft proof profie, as well as instructions for installing and creating Custom Proof Setups.
Soft Proofing Documentation