</source>
Note the The /NOCANDY parameter is necessary when /VERYSILENT flag is used. Without it a dialog box containing ''Please choose an option'' text will pop up and halt the whole installation process. I suspect this has something to do with inclusion of PalTalk in the installer.
winscp.inf file can be generated by running:
winscp425setup.exe /SAVEINF="winscp.inf"