One thing that helped a lot while I was trying to figure out how the Macbook worked was connecting a mouse with two buttons.
OS X does have “right-click” functionality and when your mouse has two buttons, life for an XP uses becomes much easier.
If you’re not using a mouse but the tough pad, you can do a right-click by pressing the Ctrl-button when you click.
(update) What I didn’t know was that the mouse that is provided with the Macbook is a Mighty Mouse. And a Mighty Mouse does have right click functionality (even though it doesn’t have buttons), but it is disabled by default.
You can enable it by going into the System Preferences and then choose Keyboard & Mouse.
Here you can set the right click to Secondary Button and change other mouse related settings.
(update) It is good to see I’m not alone in missing that right click option.
When you plug in a normal USB ‘Microsoft-mouse’ then you have automatically support for your right-mouse click.
Ah, yes, I should have added that to this post, I do mention the fact that I’m now using a regular two button USB mouse here.
And remember that, if you like, you can set a right mouse click connected to the touchpad too. Tapping with 2 fingers will give you a right click (be sure to turn it on in the prefs first!). Same as scrolling with two fingers on your touchpad, but now pull your fingers off quicker. Not everybody likes it, but it works brilliantly for me!