i actually just realized that you can transfer between clients running on the same machine. very interesting, iirc this was not possible with mldonkey.
i was just trying to transfer a file that nobody has complete from the official edonkey client to amule so i set the priority of that file to maximum and waited for amule to get it. if you want to transfer regular incomplete files from one client to another this obviously doesn't work since you would be uploading to everybody and not just to your new amule client but you should be able to make it work by using an ip-filter...
