Hi there
One thing you might do would be to use the new feature of
RoboHelp to assign shortcut keys to do the following:
Click View > Toolbars > Customize...
Click the Keyboard tab
Click the drop-down selector for Category and choose File
Choose "Load Default Environment" and assign a desired key
sequence
Choose "Load Environment" and assign another key sequence
I think at this time it's the best you will be able to do.
You can then use one key sequence to easily load up the Default
environment and the other to easily open the dialog to choose the
other layout.
You should probably consider submitting a Wish Form to ask
Adobe for some changes here. For instance, allowing you to assign a
key sequence to load a specific saved environment file.
Click
here to view the WishForm/Bug Reporting Form
Cheers... Rick