Speed Up Your Connection In Windows XP

By default, the packet scheduler limits the system to 20% of the bandwidth of a connection, to increase bandwidth :

1-Open Run dialog box from Start menu.
2- Type “gpedit.msc” and press Ok.
3- When Group Policy run, go to Local Computer Policy > Computer Configuration > Administrative Templates > Network > Qos Packet Schedule
4- in right side, right click on Limit reseivable bandwidth and select Properties.
5- In Setting tab under Limit reservable bandwidth section select Enabeled .
6- instead of 20 type 0 (zero) and then click ok, and close Group Policy.
7- Now , go to Network connection and right click on your connection and select Properties.
8- Go to Networking tab and cheek Qos Packet Scheduler to be ticked.
9- Restart your PC.

yeah! you got the high speed connection now..
be success..

How To Change Ur Ip Address

(Dari forum sebelah)
Im just sharing this stuff....but i guess not applicable, maybe, what do you think?
I've tried this on both Windows XP and Windows 2000, and it has worked.

1. Click on "Start" in the bottom left hand corner of screen
2. Click on "Run"
3. Type in "command" and hit ok

You should now be at an MSDOS prompt screen.

4. Type "ipconfig /release" just like that, and hit "enter"
5. Type "exit" and leave the prompt
6. Right-click on "Network Places" or "My Network Places" on your desktop.
7. Click on "properties"

You should now be on a screen with something titled "Local Area Connection", or something close to that, and, if you have a network hooked up, all of your other networks.

8. Right click on "Local Area Connection" and click "properties"
9. Double-click on the "Internet Protocol (TCP/IP)" from the list under the "General" tab
10. Click on "Use the following IP address" under the "General" tab
11. Create an IP address (It doesn't matter what it is. I just type 1 and 2 until i fill the area up).
12. Press "Tab" and it should automatically fill in the "Subnet Mask" section with default numbers.
13. Hit the "Ok" button here
14. Hit the "Ok" button again

You should now be back to the "Local Area Connection" screen.[/b]
15. Right-click back on "Local Area Connection" and go to properties again.
16. Go back to the "TCP/IP" settings
17. This time, select "Obtain an IP address automatically"
18. Hit "Ok"
19. Hit "Ok" again
20. You now have a new IP address

With a little practice, you can easily get this process down to 15 seconds.

P.S:
This only changes your dynamic IP address, not your ISP/IP address.