W7 HP x64 fresh install - won't detect usb flash drive for drivers

Hi, just installed W7 on a new build and can't get the drivers installed. I was having issues during the installation - it was hanging on finalizing settings - and did a new install without the ethernet connected. Installation worked, but no drivers were installed. Now it won't read a usb drive so I can't manually install the drivers. I don't have a CD/DVD drive either. At this point, I'm guessing the only thing is to try and track down a friend with a CD/DVD drive, but I'm hoping someone here might have something I can try before I do that. Any help is appreciated! Thanks.

I don't have a CD drive so I can't use the motherboard CD. I can't use a USB drive I've loaded with the drivers because it won't detect it. Right now, my thought is to used another hard drive, load the drivers on that, and connect it to the new computer.