Yes I am a total beginner with InstallShield I must admit

I am creating a new installation from scratch.
I created an installation some time ago and the splash screen that shows like "Your application" with a bitmap was removed, but I dont remember how I did it and I cant find out how to remove it on this new install.
Also when my new installation shows the welcome dialog, it shows %P as the program name, I cant remember where to set this variable

Any help would be greatly appreciated,
Dominic