Hey!
There are 2 search and replace dialogues in homesite. If you hit control-R, you get the page scope.
If you hit control-shift-r, you get the more powerful search box. It supports limited regex, and it's pretty easy to use.
If I were you though, I would look for a perl script. I don't have one handy, but I think you could write something that's faster in perl than you could in any wheeny editors.
Try this link:
http://blazonry.com/perl/mksr_pl.txt
There are dozens out there. You can always use SED too. BTW, if you want unix on windows, use
cygwin, or better,
mks. It makes windows a LOT more useful. =)
Have a good one!