There is no "system configuration" in Control Panel (at least on my system).
There is a System option that will open the System Properties screen.
If you mean the System Configuration Utility, click Start, Run and in the box enter:
msconfig
Click OK to open the System Configuration Utility.
If you want to see about your current XP setup information, click Start, Run and in the box enter:
msinfo32
Click OK to open the System Information applet.
That is the same thing you will see if you click Start, Programs, Accessories, System Tools, System Information.