I hope someone find this useful and it saves them some time.

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REM Silently install UltraVNC for x64
set INSTPATH=q:\appls\installs\ultravnc_v1.0.9.6
set DESTPATH="c:\program files\ultravnc"
if not EXIST %DESTPATH% mkdir %DESTPATH%
REM Copy ini file with new settings
copy %INSTPATH%\ultravnc.ini %DESTPATH%\.
copy %INSTPATH%\uvnc.acl %DESTPATH%\.
REM The commands has to run as Administrator or it fails
reg add hklm\software\ORL\WinVNC3 /f
echo Installing UltraVNC. Please wait...
%INSTPATH%\UltraVNC_1.0.9.6_x64_Setup.exe /silent /no restart /loadinf="%INSTPATH%\ultravnc_x64_Install.inf
REM I had this before the install and the authorized user list kept coming up blank
%INSTPATH%\mslogonacl.exe /i /o %DESTPATH%\uvnc.acl