Change IP Address (Dynamic) ?

Im currently using a router and my ISP is Roadrunner , they use dynamic ip addresses so my question is how would I be able to change my IP address, since I am using a router and my ISP is dynamic not static?Change IP Address (Dynamic) ?
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.


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.