Hi, Dmitry,

Quick answer, I'm leaving for a few hours. ;)

In a nutshell:

1) Create a typed Dataset/XML in your project (by clicking Add New Item - DataSet) that represents the final structure.
2) In the report, you can specify the DataSet as your design data source.

I wrote an article for CoDe on using datasets with Crystal, where I cover some of this:

http://www.code-magazine.com/Article.aspx?quickid=0501071

I'll be back on later this evening, if that doesn't help I'll give you a hand.

Kevin