Actually my point is/was why ask on a mirc forum about how to install/configure a bnc? why dont you ask on a bnc forum or better still try reading the README.txt file that comes with psybnc. If you have no clue with doing this on your shell account, slip a ticket to your support team, ask if they can be of any help. They may already have a shell scripted menu/installation file for bnc's.
I am not trying to belittle you but just trying to say bnc/shells have nothing to do with mirc.
Good luck