lost itunes icon from taskbar and lost access to itunes library

Through some inadvertant trickery I managed to delete the itunes icon from the bottom desktop taskbar on my Macbook (double clicked and it disappeared?!?). I located an alternate itunes icon within Finder & dragged onto the desktop. I clicked on the new icon and it was not linked to my library. I frantically started clicking and dragging random itunes library files (.xml, etc.) from Finder in an effort to recover the library. Now I have 3 different random itunes folders (all back in Finder) containing various files types and I don't know what to do. I can't seem to find or recover my original library. Should I sync from my ipod to create a new library in itunes??? I tried dragging the file that I presumed contained my macbook library from Finder directly into the Library file within itunes and that didn't work... HELP!!!