After some wasted time I realized what a functionality of IDEA can save a lot of time as to me, so to many other people.
It would be a plugin to adjust environment variables for every run/debug entry. I believe it is possible. It is important for projects, in which native code is used (e.g. then I'd be able to store my dlls in test directories and adjust PATH (now I regulary copy it into system path directory)). There would be a benefits for more seldom projects (like our), where java code starts other code, managed by environment variables values.
Is there anybody, who can create such plugin and have time for it?