Big thanks for the first replies!
How can I use this instead of the boring iTunes player?
I'm not assured that this Player may replace iTunes for you. It just more informative than habitual Windows Media Player and can work with *.PLS playlists. And may be it looks a bit better and uses less system resources (like CPU). No more than this. I just try to make it more useful (as much as this possible) for each person who want to download and use it.
Now I'll go to learn what formats can play iTunes...
wav
Are you keeping your music in a *.wav format? Hmmm... Seems this type of files is not friendly for tagging. What about information tags?