I have received .step files from a vendor, but when importing them into SW2012, I am prompted to select a template for each individual part before it creates the model.  In the past, (SW2011), after I selected the initial assembly template and an initial part template, SolidWorks (I guess) assumed I wanted to use those templates for the remaining components to be imported.   I have spent 10 minutes clicking template prompts...not a great way to pass the time.