Download and install 7-zip (it requires 5mb of hdd space) https://www.7-zip.org/download.html.
Launch 7-Zip File Manager go to Tools > Options > Folders, check Specified and chose folder on your SDcard (make new folder). Apply, Ok, close 7-zip file manager.
Then right click on lfs-setup-exe > 7-Zip > Open archive, select everything except $PLUGINSDIR and move it (extract) to your SCcard.
You need ~3GB free space on your SCcard to do this.
You can download 0.6R version from this link https://www.lfs.net/file_lfs.php?name=LFS_S3_6R_setup.exe,
you need only LFS.exe from that installation, just open setup file as a archive and extract LFS.exe and replace your 0.6T LFS.exe
They are supported since Z32 version. "Command /modified=yes allows a private host to avoid CP checks" (btw CP checks are off globally since relese of 0.6T )
It will (propably, just check) work if you every time will switch misc folder.
You need unlock game on W7, then go to Linux, navigate to lfs\data and copy-paste misc folder then rename it to misc_w7 (so you will have misc and misc_w7), then unlock game. If you will back to w7 you must rename misc to misc_linux and misc_7 to misc (and if you switch back to Linux you must rename misc to misc_w7 and misc_linux to misc). Every os must got own misc folder.
I have dual boot w10 and w7 and i use that method to play.
Can you make screenshot of folder with that file? Did you created new text file (fom right mouse click context menu) and renamed it to autoexec.lfs? If yes do you have disabled "Hide extensions for known file types" in your windows?
Beacuse autoexec.lfs its a part of Live For Speed.
Go to C:\Users\Teemu\MNK\data\script and make new one. Copy, paste, rename existing one to autoexec.lfs, then open it with notepad and clear content, if there is any.