Normally, the game will install it's own version of Quicktime and each different version could be installed in a slightly different program folder. (Quicktime for Windows, Quicktime 3, Quicktime 5, etc.). It's very possible that a computer could have two or three versions of Quicktime installed at the same time which would enable the specific games, encyclopedias to all run correctly.
I've got three different versions installed on one of my older Win98 machines and they all work correctly, but they must have different program file names.
This isn't always perfect. Occasionally, when you start to run a game, a pop up will occur asking you to install "it's" version of the QT. If you do it, the program will work fine, but you may need to reinstall a different version when reverting back to another game.
Hope this helps.
A friend has asked how she should set up a computer for her daughter that has many games that use Quicktime. Apparently some will only run with a specific version of Quicktime.
The question is How does one set the computer up so that all needed versions of Quicktime are installed and available for use when the game that requires it is to be played?
I always thought that good software always made itself backwards compatible and that macIntosh stuff was perfect.