[ESS] ESS 5.3.5 and tooltip

[Sundar Dorai-Raj]

Hi,

I just installed ESS-5.3.5 on XEmacs 21.4.19 and Windows XP Pro. I get 
the following initialization error:

Cannot open load file: tooltip

In the lisp/essd-r-args.el file it says this:

;; Users of XEmacs (or maybe non-GNU-Emacs users): The code below must
;; be slightly adapted in order to work in XEmacs (i.e. comment out
;; the delete-trailing-whitespace function call by putting a semicolon
;; at the beginning of the line). Furthermore, the tooltip option does
;; NOT work in XEmacs (yet) (and will probably only ever work if the
;; ESS-core team will adapt the code for XEmacs compatibility).

I see no such function "delete-trailing-whitespace". However, commenting 
out

(eval-when-compile
   (require 'tooltip)); for tooltip-show

allows me to to continue, but without any "argument tips". Are "argument 
tips" completely incompatible with Xemacs and/or Windows?

Thanks,

--sundar