Is there any tutorial how to create a bnk file for an audio showcase?
G.L.97 @ https://www.nfsaddons.com/downloads/nfshs/tools/5613/showcase-pack-for-ea-cars.html lists in the readme.txt the tools he used - NFSWizard, Adobe Photoshop, GoldWave, Audacity, PSound - but not the necessary steps.
Andriy Svystum (TSF Ukraine) knows how to do that. He and his team have dubbed the whole NFS High Stakes to ukrainian. You will need sx.exe (i don't know the full name of the tool) and a certain step-by-step tutorial. You can create .bnk files with it. You can also extract audio with foobar2000 with a specific plugin, but i think it can't import .wav files back into it.