How to seed OpenSUSE-10.1-alpha1 torrent?

Hello, I have downloaded the iso images from Germany and would now like to seed the for the torrent http://ftp.opensuse.org/pub/opensuse/distribution/SL-10.0-OSS-RC1/SUSE-10.0-... How can I do this? I tried copying my iso files into the ktorrent cache directory, but ktorrent appears to not check whether the cache files are further along than they were when torrent last ran. Thanks, Miles