BIOS drivers? Not sure what you mean exactly, but to all intents and purposes one hard drive is the same as another, at the hardware level (and pretty much at the OS level too). There should be no issues whatsoever with recognising and using a different HDD (or even SSD) in your computer.

If you are talking about reinstalling the OS, and needing hardware drivers for the rest of the machine, then that is a different discussion. For the most part, if your existing disk is still working, you should be able to clone the existing installation (I'm thinking CloneZilla) but if not, plug in your Windows disk (USB flash drive or external DVD) and install. Once done, look in the Device Manager to see what components haven't been correctly identified / don't have drivers, and look on the Asus website for them. Not hard.

Or install Ubuntu. Works great, at least as fast as XP was when the computer was new. Needed no hw drivers at all, everything worked right from the get-go.