The easiest thing to do is to put the pscp file in the same directory that you working in and type:
.\pscp file targetuser@targetserver:.
Pscp just used strings to represent user@host:file. The position is the source and the second is the target.
This will ask for a password and copy to the home directory of targetuser on targetserver. For more advanced stuff like login with no password, set up ssh keys through putty and reference that name. Here is what I think you should type (from the directory where pscp is):
.\pscp c:\users\mrmet_000\desktop\dgf1928_archive_backup.tar $USER@cis249.hacc.edu.