Thanks for this quick answer that helps me go even further than whan I expected.

It is available in 2003 (and earlier) click the 'More' button in the Replace dialog.
Oooops... You're right. I had checked in the wrong dialog... :^D

You cannot avoid using styles in Word (...) so it is always better to use them properly than to try and work around them
I know this, and I use them extensively. But the file I needed help for is something wild ;^)
Thanks for the advice anyway.