So what your saying is you've downloaded the songs from limewire and when you go to look for them in the shared folder, they're not there.
I've had the same problem before, but to work around it, I tried this:

1. Make sure your Limewire shared folder is not on your desktop (closed)
2. Open up sherlock and type " shared "
3. Select the file that matches
4. And in sherlock, double click the shared folder (the folder on the lower half of the screen in sherlock)
5. If all goes well, those invisible downloads will appear.

If does not work, email me at
car nagex2000@yahoo.com (put the car+nage together. I do this so my address does not get spam from email grabbers)
GOOD LUCK