I recently learned how to do this myself so I could create two different buttons with hardcoded folder locations. I used the following:
@Command([FolderDocuments];"Foldername";"1")
Of course, replace "Foldername" with the name you need and be sure to leave in the quotes.
Where it got a little tricky for me was trying to move an email to a subfolder of a folder. The normal backslash didn't seem to work. I don't know what made me think of it, but I tried two backslashes and that worked fine.
@Command([FolderDocuments];"Foldername\\subfolder";"1")
I know you're looking to hardcode the buttons, but if you're looking to create more than 2-3 buttons, I'd suggest looking to use a simple popup that lets you choose from a list of choices. That way you don't have to memorize which button is which and you won't run out of room on your toolbar.