Multiple instances of Acrobat to facilitate use with multiple monitors

Is there any way to open multiple instances of Acrobat--not just multiple windows in the same instance--but separate instances that can be controlled independently by operating system. (The way MS Word for example opens multiple docs each in its own application).
 
One reason for doing so is to facilitate spreading multiple documents across different monitors. Using the "spread across monitors" feature in Acrobat 8.0 does not work well since you then have to go in and size each monitor with your mouse and put it where you want it. It would be much better if there was a way to launch multiple independent versions of Acrobat so that you could use your system commands to move the windows, maximize independently, etc.