See also: Deskzilla Command Line Options
Deskzilla command line options are passed as java properties. For example, to set no.splash property to true, you need to pass -Dno.splash=true option to Java.
Option 1 [Windows]:
deskzilla.exe -J-Dno.splash=true
Option 2 [All OS]:
java -Xmx256m -Dno.splash=true -jar deskzilla.jar
Option 3 [All OS]:
Create a file named "deskzilla.properties" in Deskzilla installation folder and put there the following line:
no.splash=true