Problem med switch - I speak little swedish.

Hello, please help me. I'm not new on computer so i need a expert on network to help me.

I have dynamic IP with 2 IP numbers from my Internet provider. When i connect the PC i get a IP number. I can use dyndns to translate it to a word. It does that with a software on my pc, for example pc.dyndns.org and it always update my ip number to that adress.

My x-box is also getting a new ip every time i start it. But i cant use dyndns to it, because i can't automatically uppdate it?

I manually write this every time my computer starts in the command prompt and i want to have a ".bat -file" that autostart this because i use a switch. (When i write this i get full speed X-box - PC)...

arp -d <xbox ip>

arp -s <xbox ip> <xbox mac adress>

--------

How can i get the X-boxs IP number to my computer automatically? Is there any x-box software like dyndns that works on the xbox? Or any other way that solves my problem?

I want to use my switch and my network cable. It's 10 meter so it little expensive.. ;)

There is no dynip client software for the xbox.

The cheapest way for you is to buy:
an extra network card (maybe 150:-)
http://www.psxcare.com/product.php?xProd=220&xSec=49

and a crossower network cable (maybe 60:-)
http://www.psxcare.com/product.php?xProd=226&xSec=49

Go out and shuffle some snow in front of some neigbours garage for a couple of hours to get the money.