I always rebuild from scratch. Starting from tqt3 and working down. I have a build script that lets me press the button and go away for a couple of hours ... hopefully without error. BTW: I am building everything to /usr with no sign of KDE4. So far the base (that i need) builds nicely ... just a few niggling runtime errors.
Because I am building packages for other Slackware users I have been building to /opt/trinity. Another reason is to test compatibility with KDE4, although I have not been doing that lately.
When I rebuilt KDE3 for others, I built the packages to /usr and just warned everybody. When R14 is close to official release likely I will build a set of Trinity packages to /usr for myself. I don't use KDE4.
One question: when installing to /usr where do you install TQt3 to avoid collisions with Qt4? I need the latter to run VirtualBox and can't remove Qt4. Do you rename the TQt3/bin files?
Darrell