Some idea about "\item".

I'm using the HA-Proper package for writing a presentation slides.

With this package, the command "\item" has been redefined as "\xitem". 

However, everytime, when I use "C-c C-j", it only inserts "\item".  Is there any possible method to let AUCTeX figure out I need insert "\xitem" here instead of "\item" according to the current environment or the package? 

Another idea is that, for the first entry in the current list environment, if I input "\xitem", "\bibitem", etc., then from the second entry, if I use "C-c C-j", AUCTeX can intelligently insert the corresponding "\xitem", or "\bibitem", etc.

Any suggestion will be appreciated.


BTW: I'm using AUCTeX 11.54
                          CVS Emacs 21.3
                          Windows XP.

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Adam