Before you compile:
Edit your user's ~/.bash_profile and add the following lines to set the QT environment variable:
    export QTDIR=/usr/share/qt3
    export PATH=$QTDIR/bin:$PATH
Log out completely, and log back in for the changes to take effect.
To make this change system-wide, add the same two lines to /etc/profile
As user [assuming you already have gcc 3.x installed, which you should]:
    tar zxfv djplay-0.3.0.tar.gz
    cd djplay-0.3.0
    rm -f moc_*
If you installed the optional libmpeg3-1 and libmpeg3-dev packages, use this option:
    ./configure --with-mpeg3includes=/usr/include
If you didn't install those packages, just run:
    ./configure
As root, run the following ['make' MUST be run as root the first time you compile this app]:
    cp plugins/bitmapbutton/bitmapbutton.h /usr/share/qt3/include/
    cp plugins/bitmapslider/bitmapslider.h /usr/share/qt3/include/
    make
    make install