My latest Header scanner available here:
http://seismatters.com/SMSFS.html
With it you can not only view decoded File Headers, you can Copy/Move/Delete and Rename files based on selections.
SMSFS handles both SEGD 2.1 and the latest abortion SEGD V3, so you can look at files from SN408/428 and the 508, along with Unite and DSD464 GF files (if they are SEGD)
Displayed attributes are specified in Setup.
You can arrange the display order to suit your needs.
Header Decodes are available for any loaded file.
There is more work to do on it, like adding the ability to output SPS, but that will have to wait.