If you prefer, you can set up some defaults, with the 'Set defaults' button at the bottom of the UI.
This UI is the same python module that is loaded in the QubeGUI when you run Qube->Submit->Maya Job. The only difference is that when you open it inside Maya, the sceneFile and range are automatically filled in for you.
You can use the QubeGUI to easily locate the module via File->Open SimpleCmds Directory.
It's the submit_maya.py module, and it's most wxPython.
But see if "set defaults" works for you instead of editing the module.