We had some of the same issues at my day job! I had my staff experiment with VFP and DCOM. Of course, there is no documentation. I found some good examples though and shared with the team - they were able to get it working with NT (security and all)!

See the "Visual Basic Programmer's Journal Special Issue" Fall 1998, Vol 8, No. 11. There are lots of good articals in this one. See page 54 - "Setting up DCOM and NT Security". Almost all that you see that deals with VB is directly (almost) applicable to VFP.