You have to set your path properly in your .cshrc file
e.g.
set path = ( \
~/bin \
/usr/local/bin \
/usr/local/sbin \
-- Add more here
)
Also add an alias to BitchX-1.0c19 by adding
"alias BitchX-1.0c19 bx" in your .cshrc file
that way you just do a bx, instead of BitchX. Easy.