Just remap CapsLock for LeftShift, and carry on.

If you have one of those "Windows" keyboards, there are one or two "start" keys, and one or two "menu" keys to play with. Depending on your model, you may have a dozen "Net" functions and PC functions (sleep, MyComputer, etc.)

Finally, all you really need is <alt> and the numeric keypad (and maybe some ASCII flashcards). ;)