[froader]

This is just basic networking. Its not really in the correct forums.
You will need to make sure that you can connect with another computer first prior to trying to connect with your TP2.

What you need to do is start all over on your router and your computer TCP/IP.

Login to router and reset to default.(192.168.1.1- leave blank/admin)

Computer reset your TCPIP properties to default(use DHCP) and save.
Now we will set your computer to a static IP(outside the DHCP range)-knowing you have a linksys do the following.
IP: 192.168.1.200
subnet: 255.255.255.0
Default Gateway: 192.168.1.1(router address)
DNS: 192.168.1.1(router address)
Save these settings. Lets double check this is correct.
Open a command prompt. tpye: IPCONFIG /all
When you press enter the above IP TCPIP info should match.

Now we need to enable terminal server on your computer.

S**t! I just wrote this whole thing and realized your computer OS doesn't support Termanal Server.

XP Home and Vista Home versions do not have the feature to host a remote desktop connection!! You will need XP Pro, Vista Business or Ultimate.
EDIT: I skimmed the thread, but missed what you wrote above-woops. I can finish the directions for you if you get a different OS-let me know.

So, no matter what you do you will be out of luck. Try Logmein Free.
You can also install Windows7 RC1 for free to try it out.