I'm new here so i don't know how successfull people were in the last 17 years, because when i look for it, i find 2009 Articles.
From what i understand Dune2.exe has to be edited and there is also an emc file in one .pak but i don't find guides how to edit that exe ...
edit: i found some pdfs here and used chatgpt to help me with that. This Powershell command fixed the decay rate on concrete for me. (i played 1.07 US ). the shown path
"H:\Zoggers\DOSgames\DUNE2\DUNE2.EXE" is the one on my hdd. you have to change that to yours (also make a backup in case it doesn't work for you)
$b=[IO.File]::ReadAllBytes("H:\Zoggers\DOSgames\DUNE2\DUNE2.EXE");$b[0xF686]=0x90;$b[0xF687]=0x90;$b[0xF688]=0x90;$b[0xF689]=0x90;$b[0xF68A]=0x90;$b[0xF68B]=0x90;[IO.File]::WriteAllBytes("H:\Zoggers\DOSgames\DUNE2\DUNE2.EXE",$b)