PT 6.4 Name Region and File to disk

Hi there,

I seperated a region from the rest of the tack, double click the seperated region with the grabber ... it gives me the option to rename the region but not the file ... I want to rename that section of the file so I can Import it into another session. Most of the other regions dispay a check box to name the region and then another check box to name the region AND disk file

How do I get this option for a region of my choice?