As you use "torrents" why not just use the special edition that contains a bandwidth limiter of sorts, just select a lower connection than you have and then the program only allows a low upload.
Or try this program, I installed it, and it works for me...
.
http://bandwidthcontroller.com/
Take control of your network traffic bandwidth. Limit the data rates of all traffic flowing through your server. No client software needed. Filter based on IP address, protocol, port, network adapter and direction.
Yes it has a 30 day trial, then your on your own.
http://download.com.com/3001-2085-10188777.html
Or
Use this search engine, I have already inserted "bandwidth" it has many programs, however some will not be relevent.
http://download.com.com/3120-2001-0-...dwidth&ca=2001