Issues with old version of Quicktime and Windows Vista

Question

I have recently upgraded a PC of mine to Vista. In doing so, I seem to have issues installing an old application that used Quicktime 1.6 (yes, 1.6, you read that right). It is an old piano teaching application called Piano Discovery) that uses QT1.6 to play video and audio files as part of the instructional process. It was originally written to run on Windows 3.1. The problem is that sometimes it will install in Vista and sometimes it will not. It seems that if a fresh clean install of vista is done, and the program is installed immediately thereafter, before any updates from microsoft, it works. But not always. When it does not work, trying to install QT1.6 as part of the program installation results in the following error:
QTINSTAL caused a general Protection Fault in module QT16INST.EXE at 0002:5DA9
The installation then fails. Now you are all probably wondering why I don't use a newer version of Quicktime. Tried that. Won't work, unless there's something I need to do to quicktime settings to make it look like the older version so the piano software will recognize it and use it.
I realize I may be SOL here, but thought I would post in hopes that someone might have a solution. Thanks.

Answer 1

Ok, so you need to install this on multiple systems and need to determine what steps work and which ones don't as the variables that you can discern don't seem to play a role... repeating what appear to you to be the same steps on two different systems yields two different results. And, if this is a classroom setting, you don't want to have to depend on virtualization because the important thing is that the app is simple to access. I'd also guess that there's some other reason for the push to Vista or you'd have stayed with what works (I've worked in situations where, for whatever reasons, decisions are made and you just have to work with what you're dealt!)
I'd think you're correct in that there's probably not a provision for the latest QuickTime to behave like the older version as large portions of the API has been rewritten over the years.