Hi there,
You have three choices here.
1) upload what ever files you want to your
VPS in a zip file via a
plesk created
ftp account and expand the zip file via winzip or your choice of zip application in a terminal service / remote desktop connection.
2) Choice number 2 is to the use the file manager in vzpp once you login to
plesk via your cp.blacknight.com login
3) create your own
FTP account in Inet Manger via terminate services.
Paul