Need to open ports

[MP79]

I need to open the ports on my computer for bitorrent. They are stealth, I think that means they are firewalled, but I do not have any firewalls or routers. How do I open these ports? Please help. And are there any tricks to get faster download speeds for bitorrent?
Have windows xp home edition SP1
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[KenGr]

This should get you started:

http://support.microsoft.com/default.aspx?scid=kb;en-us;308127