there are many ways of changing the ports that bit torrent runs through but before i tell you, please keep in mind that the reason that most donloads are slow is because not enough people are seeding. but anyway the first way to do it is to open your internet browser and type in your configuration number of your router in the ardress bar, if your not sure what yours is then try 192.168.1.1 or 192.168.1.0 then try and find port connections, sorry that i cant tell you exactly how to get there as im sure i dont have the same router as you!
then change the ports for bit torrent to:

6881 to 6889
hope you find it!


xx