To have it said, even plain old WordPad offers a "Search and Replace" tool.
But it sure would be nice to have a "config customizer" with radiobuttons and checkboxes for convenience.
Umm don't think I didn't try that man, you actually shouldn't do that with gregtech configs as it gets you in trouble certain EZ mode things need to be false and some true. It's too complicated to to just search and replace standard word pad does not seem to have a search and replace function within a selection. At least it didn't work when I tried.