Just a little upset, lost my post. :( Not of the mood to re-type the whole thing. Cables all the same for OBD2? Can buy from ebay the $6 USB/OBD2 cable? Software like any other, just has to support the vehicle make/model?

Need to be able to do this on the referenced car:
2. Check PCM
(1) Ignition "OFF"
(2) Connect Scantool and Engine "ON "
(3) Select simulation function on scantool.
(4) Simulate voltage at terminal 2 of HO2S(B1/S2) sensor signal connector.
(5) Is HO2S(B1/S2) signal value changed according to simulation voltage ?
YES
1) Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "Verification of Vehicle Repair" procedure.

Found these http://sourceforge.net/projects/scantool/ http://torque-lite-obd2-and-car.soft112.com/ but can't test them out until later today. I somewhat expect they don't have the functionality to do this though.