Commands vi and man will launch in separate screens when called inside GNU screen. You need my scr file as well.
# $HOME/.bashrc - Jonty's own settings for all shells, not just login
# Jonty 28-Aug-2005
# Shorthands to launch 'vi' or 'man' in separate screens
# when we are running in 'screen'.
function vi() { scr vi $* ; }
function man() { scr man $* ; }