Getting the Language pack lp.cab out of the downloadable exe files.

You can get them out by running the EXE, as it extracts/creates the cab file. In my case the German package windows6.1-kb2483139-x86-de-de_acb9b88b96d432749ab63bd93423af054d23bf81.exe
However the issue, I had found, is that the EXE quits very fast and deletes the cab file right away.
I considered running PSSuspend against it, but the issue is that this would still be a game, as the cab file gets built slowly, but deleted very quickly if the OS refuses the install.
So the next best solution is NTFS permissions, simply create a temporary DACL for EVERYONE with DENY for “Delete Folders and Files”.
This will leave your lp.cab ready for the grabbin :)