test suite using variable property

 Hi, i'm a beginner in SoapUI tool.

I cannot found how to do a load test where the request loop with a property that change every time ( in this specific case cars plates).

I try to explain better: i want to make a load test using many different plates, without create many step as many as the plates

Is it possible import a file with data and use it for feed the property of the request?

thk to much for your reply