[Keyboard] Command and option keys ?

I have a COMPAQ Laptop with Leopard 10.5.1 installed, and the big problem is with the keyboard !
I dont know which button is the Command and which one is the Option/Alt key ?

Ctrl does not work as Command button...

hello , i hope this will help u i used it for my dell laptop :
left alt is the command button
the left ctrl is the control button
but about the option button i know nothing

On System Preferences / Internation has a option to see keyboard layouts. See all keys there.