....but it's just the version I'm trying to install, version taken from the first page of yours post the one that you just told me, but I can't install it on my version of BAT (4.1.2)
Ranwers' P-38 file on the first page can only replace the pilot of Barnesy's P-38s...of course, we'll have to revise that a lot, too.
In other words, it's completely different from the P-38s on BAT. For P-38s of BAT, we need to do separate work using Ranwers' file.
Can you use 'dump mode' ?? If you can, dump one P-38 model you want and put the file (ex: P-38***(USA)) in the 'Pilots USA ETO' folder of Ranwers.
After you do this, ask for an explanation again.
And I am not an English speaker. There are many difficulties in writing & reading English. Please understand this point first.