how to make Data driven array???????

Hi All,

I am using SOAP UI to test a web service.
My webservice has multiple arrays as inputs

e.g I have an array of users to be used by a request

I want to make it as  data driven array to provide input .

I want some data driven solution  for following scenario  -

I have array of users ->for each user I have a product ID which is also an array ->For each product Id there are mulitple attributes

Can any one know the solution for this.?
It will be useful if you provide any simple example over this.

I am using Excel as my data source.

Please reply as soon as possible