Weird song file names

To cut a long story short, i copied a load of songs of an ipod onto my pc, the problem is, that now they are on my pc, all the names seem to be shortened?!? As in every name of all the songs have been shortened to 4 letters
eg: “Daddy cool” has been shortened to “AKAV.mp3”

[left]btw it shows the full name in itunes.
Any ideas how i could change them all without having to going one by one finding out what it is???


edit: i found something out. within all my songs there was a file called:
iTunes Library.itl
and i found out that if i delete it, then all the songs dissapear from itunes! Note i didnt delete it i only moved it to a different file and back again…