My computer

Start by going to the Windows XP Power Toys page:

http://www.microsoft.com/windowsxp/pro/downloads/powertoys.asp

(Remove any spaces from the pasted link)

Download and install TweakUI.

This utility gives you control over a number of system settings.
Since I'm not on my XP box at the moment, I don't know for sure if it gives you the option to disable both items.

You can use system policy editor to create user profiles that would limit access to items such as Control Panel.

You do however, want to keep Control Panel accessible from the Administrator account.

Chas

click on setting\taskbar & start menu\ advanced
uncheck:
expand my computer
expand my docuement
expand control panel