Yes ok I undertand both solutions, but only the last question.

If I try set the variable in (Windows) cmd as you and try to write it in Ensemble terminal it return empty string. Do you know reason why?

Ok thank you so much but I've got some more questions.

1. You mean passing variables to installation Manifest by tag <var> is it right?

2. This is maybe stupid, but if i set var like this, how can I get to them by my .cmd file is there any possibility?

But once again thak you so much.