This is detailed in other thread but d3drm.dll file needed and not in Vista and download or copy from xp.
When placed in sailsim installation folder sailsim would not load at all.
Tried it in the Vista windows folder and the sailsim loaded but only tested default route so far but seem OK
Also don't forget update patch from stentec or runs at 1 to 2 frames.
Also this is just what I did on my new computer with VISTA.
What you try is definitely at your own risk!
Barry