Fixing What's This and Tooltip text strings

I would like to update branding issues in all of the What's This and Tooltip text strings. Primarily changing KDE -> TDE. A challenge is many of the text strings are multiple lines. A simple find/sed one-liner will be insufficient. The What's This strings are contained in TQString functions and end with the traditional semi-colon. Additional What's This strings are in XML files enclosed in <whatsthis> and </whatsthis> tags. The tool tips are embedded in i18n functions. I'm no expert with awk or perl and I'm guessing either is better for addressing this challenge. A good way for me to learn some basics about awk or perl is to update these text strings. I would appreciate some awk/perl tips or pointers for approaching this mini project. Thanks! Darrell