How to open up more than one instance of Microstation from ProjectWise?
After you open up the first instance of Microstation, go back to ProjectWise, select the next Microstation drawing file you want to open and, while holding down the shift key, double-click on that file. It will open in a separate instance of Microstation. If you failed to a double click or not on your mouse, try right clicking and selecting Open while holding down the shift key to make sure the command is executed correctly.