How do I set up a Hotkey for Fireships?

Hey all,

I currently have fire ships on W but when I select the docks and press w nothing happens. I first have to press the arrow to go to the next page in the dock so i can click w and a fire ship gets queued.

Is there some way for me to set up my hotkeys so that i can press my dock hotkey and the fireship hotkey afterwards ?

Hotkeys, there is no other ship which would be queued on W which could interfere