So work flow would work something like
Ghidra for E38 with a XDF tuner pros fine
and emu loaded for your decompile and test as you go
Need to get to VVE and coefficients decompiled
Use Bluecats VVE
and VVE Assistant
So your asking your AI and training it as you go
You should get you in ball park around 99.9%
you`ll also need gen 4 tuning software to compare against