Simulating the Windows key on an old keyboard

I’m using a very old keyboard that doesn’t have a physical Windows key — it does have a 5/180° connector and an AT/XT switch on the back — but I don’t want to completely miss out on the functionality of the Windows key.

Is there some group of keys in Windows 7 Pro that simulates Win when used together? In other words, I want to be able to take any key combination that uses Win, mentally remove Win and drop in this other group of keys and have the original combo work.

If no such combination exists, how can I create one?

I know that I could just plug in a newer keyboard that has a Windows key, but the whole point of this question is to avoid that. None of the existing windows-key questions seem to address this; the closest is this one, but it doesn’t actually say how to create the mapping.

This is for my work computer, so “install this utility/plugin” isn’t a good option for me. Feel free to answer with those for the benefit of others, though.

Solution:

Remap your capslock key with a quick registry hack?  The Caps lock key is worthless.

Paste this into a file called something like remap_caps_to_windows.reg and double click it. You must restart for the changes to take affect

Windows Registry Editor Version 5.00[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlKeyboard Layout]"Scancode Map"=hex:00,00,00,00,00,00,00,00,02,00,00,00,5c,e0,3a,00,00,00,00,00