Run DWGTrueView_2018_ENU_64bit.sfx.exe and the files will extract to a chosen location.
Create MST file against DWGTrueView_2018_ENU_64bit\x64\dwgviewr\dwgviewr.MSI with all your favourite modifications, including ALLUSERS=1 and ADSK_DESKTOPSHORTCUT_1=0 (for no desktop icon)
I found changing the setup.INI for things like "CREATE_DESKTOP_SHORTCUT=NO" didn't work.
Edit the setup.INI file anyway and add the following line to include the MST in the installer-
In section ===== AOEM =====,
in keyword "EXE_PARAM=",
add data value "TRANSFORMS=%platform%\dwgviewr\dwgviewr.mst"
From all the other information out there, to install DWG TrueView 2018 with setup.exe /W /l /q /t setup.ini (I don't know if case in the switches here makes a difference)
Setup Type: Windows Installer (Delivered as an EXE)
Deployment Method Used: Vendor Provided Command Line (switch driven)