Where to find the script?

it's not one of those film easy to translate or easy to read if yuo're not italian: it's in dialect(slang),and italian dialects are incomprehensible( also to italians who are not from that particular zonea Rossellini's movie completly in dialect is subtitled in the italian version too). it's not this case,'cause Sordi speaks a sort of "roman slang" who is easy to understand.

anyawy: i didn't find a script.

I found a way! There are a few places online where you can download text files containing all the subtitles for a given movie. For really famous movies you can find subtitles in most of the major languages. These files are intended to be used with video playback software, however, they are text files! That means that you can read them, print them, etc. There you go, you'll have all the dialogue in your hands.

Google subtitles and you'll find those websites.