|First of all you need to determine if the new drive is being configured by the BIOS in your laptop. Watch the POST screens at start up. Watch fro both the drive model and the FULL drive capacity.|
Your laptop came with a 100GB hard drive so the BIOS may not be 48 bit LAB compliant. That means it can't use a hard drive larger than 127GB. If the drive is being configured correctly then the problem may be that the new drive is SATA II type and the old is SATA I. There should be a jumper available on the back of the drive to configure the drive to run at SATA I speeds.
If you don't see any POST screens then boot into the BIOS (setup) and see if you can disable the Gateway logo. If not, you may be able to hit a key during the start up to bypass the logo. You may need to consult your manual for more help with that. Disable fast boot in there too.
Needless to say, if the BIOS is configuring your drives, which I suspect if the case, then WinXP will not find them either.
In the boot up it give me the drive model but not the capacity. Not sure where the jumper would be on the drive. If I look up the specs on the drive should it tell me if its SATA I or SATAII? It does show up in the BIOS but is it possible its not being configured?