Thanks to everyone who answered.

I have managed to solve problem with Resolution changer 3.11 (www.12noon.com). It’s a program that can change width, height, color depth, and refresh rate temporarily or permanently with command line switches and its freeware.
If anyone has similar problem I suggest using it- but its not so elegant or professional solution. (There is also a console edition that I haven’t tried yet).

Thanks again!
