Heck gimme a chance
Upgrade.INI;-
'Upgrade' should be set to the corrosponding entry from the Upgrade= line in CommandButton.INI.
Type= wise to make sure this doesnt conflict with CommandButton.INI or unpredictable results arise - if your Type= here is PLAYER, then your Command= in CommandButton.INI should be PLAYER_UPGRADE. Likewise, if you set OBJECT here, then in CommandButton.INI it should be OBJECT_UPGRADE. Just for consistency and to make sure it all ties together nicely and works
You can also use QueueImageDisabled=, QueueImageHilite= and QueueImagePushed= for those nice visual tweaks