ILISP has been completely superseded by SLIME.
I'm finding ILisp a bit confusing. I think I have it installed in Emacs for CLisp and CMUCL, but when I try to edit files I think elisp is still in charge, e.g. the error handling after evaluating (/ 1 0). How do I get CLisp to "kick in"? I've copied the ilisp.emacs to .emacs and changed the various paths.