Well a torrent is a little text file and i have found that unless
you install torrentflux (a php torrent tracker that includes
a web seed and initial seeding function) it goes slow until
peer number two comes. but the torrent flux will actually
act as a client/peer/initial seed on the php server if there are no other seeds
running. opentracker is a simple tracker thats written in php
and i have used.
I think that you need that initial seeding function of torrent
flux for what you want to do because the way the torrent
works is to prevent leeching, inother words in some roundabout
way they wont let you get all the file until you at least reproduce
yourself in the peer list cause most people hang on to the
p2p network only until they get the file then they split. and
this way your never giving but random pieces of the file and never
the whole file so i dont know if they could prove that an individual
peer did anything but contribute to the entire file that someone else
may or may not have collated on their end.... the proof is so far scattered
and the gnu networks are still getting hosed and they riaa is still there but
the torrents are still generally wide open for movies although im sure that
will change...
:you know i want in on this: i think that its okay to copy/distribute/share
software or movies if you destroy it right after you view it or watch it....

ill be totally available for experiments with seeds but azureus
has serious issues on the mac with not allwoing things to go as fast as you
need to... id emulate xp and use utorrent i have found that this is one of the
few places where windows shines they others seem to cock block the bandwidth
no matter what connection you have... and utorrent will also act as a server using
the DHT network (whatever that is.) so that dont have to have a tracker at all
but the torrent flux application may be what you need here.
I will do some more research into this, if you need someone to stand by and
accept torrents and help you dev i have the time and im down so ping me!!!!
I think i read a thread here on opentracker:
http://www.perkiset.org/forum/php/php_open_source_torrent_tracker-t1121.0.html