With this shell extension you can hover over dvr-ms files and get more detailed information through a tooltip as pictured below.
Tested on Windows Media Center Edition 2002, 2004, and 2005
The installation is a self extracting executable that comes with register and unregister scripts as these are installed as windows explorer extensions.
Probably not at this point, the DVR-MS extension is deprecated and I don't really know how the WTV format works. Truthfully I don't even use this anymore as I've upgraded to Windows 7 which has integrated this functionality into Windows Explorer when you highlight a file and look at the status bar for same information.
aerojoy 1179922525000 #1