Change Page Break

I made a slight change to the pageBreak code and I was wondering if it would harm anything/cause any problems. I also would like to know if I need to do anything else than what I did.

I did a search through all the files for pageBreak and replaced
<span style="display:none">&nbsp;</span>
with
<span style="display:none"><!-- page break --></span>

I did this so I could paginate articles and I wanted to be sure that it was a pagebreak before "exploding" my text content by the html used for page breaks.

Also, should I do anything else to ensure this works properly? I think i changed it on a couple of files:
fck_othercommands.js
fck_ie.js
fckeditorcode_gecko.js
fckeditorcode_ie.js

Thanks.