All I was needing (today) is a small midi player.
I found vanbasco (it was mentioned in a forum: https://portableapps.com/node/16957 )
Website: http://www.vanbasco.com/
I installed vanbasco in one folder, then I moved it to another folder.
I launched vbasco: Vanbasco is working fine. I closed it.
I checked the registry, I deleted the entries of vmidi (the executable).
I launched vbasco a second time: everything is still working fine!
... So far ... sounds good!
VanBasco might be a decent candidate for the TPFC DB (if portability is confirmed).
VanBasco - midi player
Re: VanBasco
Fact checking: last release of VanBasco's Karaoke Player is v2.53, dated 2004-03-12 (available changelog is at http://www.vanbasco.com/karaokeplayer/history.html).
VanBasco's Karaoke Player 2.53 is a MIDI karaoke player for Windows 95/98/ME/NT 4/2000/XP coming with full-screen lyrics display. It supports skins, change and recall of tempo, volume, key control, mute/solo instruments, and much more.