Okay, from step one...

Create a copy of the "medieval2.preference.cfg" file in your M2TW folder. Rename it "MyMod.cfg". Open it and add the following lines somewhere (presumably at the top):
Code:
[io]
file_first = 1

[features]
mod = MyMod
Next, open notepad. Add this line to an empty text document:
Code:
medieval2.exe @MyMod.cfg
Save the file in your M2TW folder (where the .exe is) as "MyMod.bat".

Run the file.