Once the official autobuilder version is ready I'll link to it from here:
where I can put other documentation and others can contribute.
ctorrent provides a -M max_peers option to control the maximum number of peers, so keeping within the socket limit should be possible. I haven't tried any very popular torrents as those tend to be large files and I'm a bit tight on disc space on my RPC. But BitTorrent is definitely a good way to stress test a network... it's the only application that's ever saturated my upstream and downstream bandwidth.