Salut shashgo, in the search window right click on the colums (name, type...) to enable the view of the vendor column. If the vendor corresponding to your download says RAZA, prepare to be patient.... (In summary it is the client Shareaza that uploads to many network thus giving ridiculously low speed downloads). You can always try to repeat the search, LW will pick up any new sources in the results for the file you're dling.
Bonne chance
