Just tried the scripts for the beta 3 and they worked fine. I was able to create, compile and deploy the template to my iPhone.

But I have a question: there is any way to create the interface through Interface Builder and compile it to 1.1.4?

riruilo, I didn't understand what you said.
For this to work you must have the iphone SDK aka XCode 3.1, and it must be on /Developer and the latest version say it right:
(#) 1.1.4 platform SDK creation script for XCode 3.1 beta 3 -- by Darkmen