[TxMt] Open in new window key binding

[Edward K. Chew]

Just wondering how I can go about assigning a key combo for opening  
project files in their own windows?  (I like to keep the files I'm  
actively editing in separate windows so I can easily compare back to  
what I already have.)  The help says to go through System  
Preferences, but it wants the exact name of the menu item, which is  
variable in this case (Open "foo" in New Window).  Also, it seems you  
can only open one file at a time this way, which is a bit of a drag.

-Ted