Hi,
Here's what I did to get my keyboard working with Ctrl-Alt-Del.
Workaround for missing keys:
I prefer to have no background applications for remapping keys. Three Keys that I have remapped are:
1) Delete Key
This is essential if you want to depress Ctrl-Alt-Del to lock or access the task manager of your XP workstation! The delete key in an Apple Keyboard is actually the Windows Backspace Key. The two Apple Command Keys are equivalent to the Windows Key. I never use the Windows key, hence I remapped the Left Command Key to the Windows Delete Equivalent. I now can easily Lock my workstation Ctrl-Alt-Del in a very quick motion with three fingers on one hand.
2) Page Up / Pg Down. I remapped F12 and F11 to a Page Up and Page down respectively. These keys are a must for me in my daily Work routine for Office Applications.
I highly recommend Sharpkeys to make the remap. Keytweak is something more graphical, but does the same job. The neat thing about these two tools are they are not memory resident. These involve registry changes to WinXP upon a userlogin, hence no apps resting in the systray to get them to work.
Help: I'm unable to remap the Eject Key, Windows can't seen to read the scancodes on that key via sharpkeys or keytweak. If you manage to have a solution, drop me a note. I'd love to program that key as a hotkey to turn off my monitor or run a script.
More on how I setup my wireless keyboard on an XP Machine at:
http://edwinder.multiply.com/journal/item/1/HOWTO_Connect_the_Apple_Bluetooth_Wireless_Keyboard_2007_to_a_Windows_XPSystem