Yes, I am only using one firewall, windows firewall, and yes, it is configured for LW. I did the port test, and it said that it was okay.

OS: XP
LW & Java version: LW: 4.12.6 Java Version: 1.5.0__06
Firewall you're using: Windows
Modem/router brand & model: Netgear, I'm not too sure about the model...
ISP: Comcast...?
Connection type: Modem
Where you connect from: Home
Are you sharing a connection with other computers: Nope
Is this your first try with LW: On this computer, yes.

Sorry if the answers aren't what you're looking for. I'm particularly new at this. x_x

We'll probably need to know the model of your Netgear
Have a good look at it, the model should be written somewhere.
Ask your brother if he's got port forwarding set up!

Well, um, I'm not too sure if this is right, but, I found, 4gr614 v4? xD I know, I'm stupid, bear with me please. xD Thanks, lol. But, anyways, um, my brother is significantly younger than myself, and I doubt that he has any idea what port forwarding is? x]

There's a WRG614. The port forwarding site's got a few versions listed but not a version 4, there's a v5 & v6. I'm guessing you'd just have to use the plain ol' 614 instructions so here they are
http://www.portforward.com/english/r...4/Limewire.htm

Don't forget to set up a static IP address first, there's a link (in red) for this within that set of instructions.
After you do that & set up port forwarding, go to LW's tools > options > advanced > firewall config. Choose the 'manual port forward' option & enter the same port number as LW's listening port > apply.

No, limewire still doesn't seem to work... x_x

Did you make sure to set up a static IP address first?
Did those router pages in the port forwarding instructions look the same as the pages you saw when you logged into your router (remember, there weren't instructions for the v4)?

Yes, the router pages look the same... o.o What is a static IP address? [sorry...]