I am going to make the assumption that you already have Boot Camp installed on your Intel-based Mac system, and that it isn't the 1.2 beta release. Hopefully that's not too radical an assumption!

Your first step is to download the new beta release off the Apple site, which you can do by clicking on Download Boot Camp Now. The disk image you download has both a "Read Before You Install" document which outlines the steps you need. Fortunately, upgrading is easier than installing, so there are only a short seven steps listed.

Also on the disk image is the all important "Install Boot Camp Assistant.pkg":

Double click on that to launch it, then step through the usual license terms, installation target drive, etc. Nothing unusual and it's quickly accomplished. Once it's installed, you'll find the application in Applications --> Utilities --> Boot Camp Assistant. Launch it!

Choose "Burn a Mac Windows Driver disc" and click "Continue":

Put a blank CDROM disk into your Mac burner and click on "Burn". Then it'll show you a progress bar:

and, finally, be done. Now you can safely quit the Boot Camp Assistant as we're done with it, now that the updated drivers CDROM has been created.

It's time to boot into your Windows XP that you've already installed into Boot Camp on your computer. The easiest way to do that is to choose Apple --> Restart... then hold down the Option key so it gives you the choice of operating systems:

Once Microsoft Windows XP finally gets running, insert the new CDROM and if you have autostart enabled, it should automatically launch the installer. If it doesn't, just go to My Computer, open up the CDROM drive (E:) and double-click on the "Install Mac Drivers" icon. You'll see:

Step through the license (again!) and you'll finally get to choose what feature to install:

Click on "Install" and it'll start chugging along:

It took a good few minutes on my system for it to completely install all the different drivers. You might well see one or more of these warnings:

That's nothing to worry about. Just click "Continue Anyway" and, finally you'll get to the final screen, the final step:

That's it. Click on "Finish" and restart your WinXP Boot Camp operating system (probably you'll need to remember to hold down Option again so you don't automatically boot into Mac OS X).

Done!