XenTools are delivered as msiexec installation package
msiexec.exe /i d:\installwizard.msi /passive
msiexec.exe /i d:\installwizard.msi /quiet
msiexec.exe /i d:\installwizard.msi /quiet /norestart
msiexec.exe /i d:\installwizard.msi /Lv c:\install.log.txt /quiet /norestart