Custom Button - How to I make files show in right pane?

[r44flyer]

On the button bar I have a custom button to show the PDF files folder using the command...
cd d:\My Documents\PDF\
This works fine but displays on whichever pane I happen to be on.
How do I add a command, such as cm_FocusRight to make the folder always open in the right pane?

[Horst.Epp]

Make a button with:
Command: %COMMANDER_EXE%
Parameters: /o /p=r /r="d:\My Documents\PDF"

[r44flyer]

Thanks for the quick reply.
Works great.
Focus stays with left pane though.
Can focus be made to change too?

Edit:
Sorted - added /p=r
/o /p=r /r="d:\My Documents\PDF"

Works a treat.
Thanks