Before you do anything do this:
- read tune from ECM and save to file;
- view tune file to familiarize yourself;
- capture a few logs to see which pids work;
- play with DVT to make sure all solenoids are functioning;
- make sure powertrain is in good shape (no leaks, misses, faults);
- connect LC-2 to V2 using serial comms (null modem).
Have you seen these docs:
E38 VVE Setup Guide
Virtual VE Tutorial
Use serial comms to connect the LC-2 to the V2.
For the BEN pid, use CALC.WO2BEN from the Calc.VET thread (post #1 is the tutoria).
Correcting the MAF is easy (disable VE, disable CL/LTFT/STFT, apply WO2BEN to MAF tables).
Correcting the VE coefficients takes a bit more work (disable MAF, disable CL/LTFT/STFT, apply WO2BEN to VVE surface, generate coefficients... but do read those docs).