I can reach computer B only by first logging in to computer A with putty, and sshing to B.
I transfer my files from B by first transferring them to A (using the command line sftp), and downloading them from A with WinSCP.
Is it possible to reach computer B directly with WinSCP (through computer A), so that I wouldn't have to type so much in the command line to get my files? (Logging in to A, then to B, tar-gzip-ing the many small files, sftp back to A, then use WinSCP to reach A from home -- that's a lot of typing passwords and commands).