Good that this spam message came in here, I totally had forgotton about this thread.
First of all, the search & replace function in Globalpark is survey based and not totally global. I think it won't be necessary to go over the whole Limesurvey installation. Usually it is some kind of wording the client wants different or was written wrong or a brand name has to be changed, but this is usually the case for one survey and not the whole installation. But of course it has to include all texts visible in the survey like questions, explanations, answers, tooltips, etc.
In global park you have a little search field, then they list in a table all the occurences together with the identification (e.g Question number) and some text around it, so that you can identify. Then you specify which of those occurences you want to change, and which shouldn't be changed.
Then you specify to what it should be changed and there you go...