[gcmd-usr] current filename to terminal command--how?

[Steve]

Hello,
I want to open a terminal and run a command and after viewing results, 
manually close the terminal.

The command is:

xterm -hold -e parverify (filename GC was pointing to here)

How do I get the filename (ends in ".par2") that GC was pointing to when 
I opposite clicked and chose to run my command into the command's args?

-----------------

2nd Question (if I may impose...)

I would like to use the advanced renaming facility to work on audiobook 
mp3 files.
Where would I find either documentation or examples of syntax to use it?

Steve
email: smitchel at bnin.net