IBM 2645-A1U PCI Bridge & USB Drivers

I do not have access to the recovery CD for this machine and require PCI Bridge (most important) and USB drivers for this machine.

If you know where I can a) obtain an ISO of the config CD, or b) obtain these specific drivers, please provide them.

I have thoroughly torn apart the IBM support websites searching for them, but cannot locate.

My end goal here is to be able to get the modem installed. I cannot get it to detect without first having the PCI Bridge driver installed.