I believe someone stated earlier in this thread that the FMS Visual 28R could be coupled to autoflight and A/T and track a solid 3D (LNAV/VNAV) path to roll out on final at WP F101D (4.4 DME SFO VOR), which is aligned with the runway at 3.6 nautical miles.
terpster, the solution gets goofed up when the legs are too short. at/abv 1800 SAMUL to F101D may be too short for a solution. We had troubles with this at other locations, but the min length is subject to many variables, so to give a min length as a rule of thumb is difficult.
Previous comments stated that the ac may not have been GPS equipped. This would negate them even using the procedure, so who knows.