I dont really understand what you mean by "taskbar type". Do you want each windwos app to have its own window under linux. If thats the case, you can use WINE(WINE Is Not an Emulator). There are thousands of windows applications supported by wine (most are games). I am yet to use it, but from reviews, it seems to be pretty good.
A shot of windows media player playing on Linux with WINE
http://www.ibiblio.org/sinner/wine/MediaPlayer01.jpg