YIKES I am sorry Sapphire That your computer didn't work for your new hard-drive.

I use a Dell Pentium IIII I installed a second hard-drive very easy. My second hard-drive is the Slave to my main hard-drive. I used to have only 40GB of hard drive space, I added a Western Digitial 160GB hard-drive as the Slave to my main on. Thus I now have 200GB of hard-drive space.
I have two CD/RWs and someday I'll buy a DVD/RW and install it. I have Bose Speakers and Altec-Lansing, Five speakers all together. I run Windows XP Home Edition.
I wish I could help you Sapphire, but, I don't understand Gateway's sorry!
Blessings, \o/
KristiAnn