I like to extract ultima4-1.01.zip and u4upgrad.zip, so
I can use the same savegame with xu4 and u4dos.
The VGA upgrade has a file called README.txt.
The Windows version of xu4 also has a file of that name.
The xu4 installer for Windows doesn't have an
auto-rename option, so I have to choose which readme I
want to keep.
Rename the xu4 readme to README-xu4, or rename the
readme file in the VGA upgrade mirrored on the xu4 website.