Not Living with KDE4

Trinity is intended to coexist with KDE4. If I set my build options to install in /usr rather than /opt/kde3, how much will break because Trinity expects to exist in /opt? Hopefully nothing in the sources is hard-coded to /opt. I want to make that an option in my build scripts and not a requirement. In my build scripts I can set the --prefix option to /usr. Or /opt/kde3. Or whatver. I really do not want to install in /opt and have no motivation at this time to install KDE4. I suspect many people using KDE3 don't care about KDE4, although ensuring they can coexist is a pragamatic decision. Darrell