I,m in trouble (firewall, need help with system details)

[64falcon]

Hi Guys.
I think I'm toast. I just installed limewire pro for my daughter but it wont work. I see that I'm suposed to provide system detail but half the stuff it asks for I don't know what it means. I'm pretty sure I have a firewall problem. I figured out how to check my microsoft system and it shows it will allow limewire. I dont know what type of internet I have. Its not satilite but it does have a dish that that looks like a sat. dish but it points at a tower miles away. Do I have a router?-> I have know idea. My computer is a pentium 4. Does that mean anything to anyone. So can someone help me or did I just waste my money buying this. I will need very clear, very precise, step by step instructions that dont have computer lingo in them. It took me half an hour to learn how to make this post. I've never done a forum thing before. I apologize in advance to the poor soul who tries to help me out. I just hope I can find where to go to get your answers after I send this.
Thanks in advance
Stu