I don't know why it needs these two software, but I'm sure that for moi3d I had to install Gecko and as it says here it needs IE7, for Winetricks it can be useful to install and manage the versions of Windows, in my case the interface of the windows changes and I don't know what it is now but with a Windows version I can better explore the operating system directories, and you can install recent versions of DirectX and OpenGL and various dlls

For the rest I try to investigate better but every time I update WineHQ and open Moi3D I have to wait for the installation of the two components otherwise it won't start.

https://appdb.winehq.org/objectManager.php?sClass=version&iId=7383