Ok. Right, here goes:

I'm on Windows XP
Broadband connection
Trying to connect from home, where I've got wireless connection to our network, which is shared with our house computer. (I'm on a laptop).
We use Toucansurf ISP
I get a "your test worked!" page when I click on the link
Not sure what firewalls are exactly, but I'm on Tesco security/antivirus.
Just found a firewall button. Apparently, my windows firewall is turned off.
Can't find how to check memory etc...

And when I open LimeWire, there's a little symbol in the bottom, an earth-type thing with a wall infront of it. And a green circle with an 8 in it.

That ok?