After having a hard-drive crash, I had to go through the tutorial in detail.  Everything went well until we started in on the icons.  I have a couple of small items I noticed:
The code for moving the Icons has a typo.  The RailPro and Icons are reversed in the Move lines.
Under Ubuntu 20.04, the desktop icon doesn't function the same.  It was not an issue, as I was able to make a Wine Lnk file that works the same for me.  I even hooked it up to the icons you included!  
Otherwise everything went perfect.  Now, I need to get used to Ubuntu 20.  Things are a little different.
Thank you very much for developing the installation guide!  It is greatly appreciated!!