I need Network Controller and Ethernet COntroller drivers for my Gateway 450ROG, running OS XP SP3.

Go to Gateway.com and in the search type in 450ROG. At the top of the list you will see Gateway 450ROG, click on it. Now click on software information and then Windows XP. You should now see a list of software drives. A little better than halfway down the list you will see Network - Intel PRO/100 V..... click on this. You will now see how to install this driver from you system disk (provided with the laptop).

If you do not have the disk, then follow the link below directly to intels web site for download. The reason I posted the link, finding it was a lot more steps than I would like to type up here.

http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18717&lang=eng&OSVersion=Windows%20XP%20Professional*&DownloadType=Drivers

From Gateway's website:
http://support.gateway.com/support/drivers/getFile.asp?id=19077&dscr=Integrated%20Intel(r)%20Pro/100%20VE%20Network%20Card%20drivers%20for%20Gateway%20600YGR,%20600YG2,%20450RGH,%20450ROG,%20450SX4,%20400SD4,%20400VTX,%20M305CRV,%20and%20Solo%201450