Add to your system or personal profile:

export PATH=$PATH:/opt/gnome-1.4/bin
export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/opt/gnome-1.4/lib/pkgconfig
export GNOME_LIBCONFIG_PATH=/usr/lib

if [ -z $INFOPATH ]
then
  export INFOPATH=/usr/share/info:/opt/gnome-1.4/info
else
  export INFOPATH=$INFOPATH:/opt/gnome-1.4/info
fi

Add to your /etc/ld.so.conf:

cat >> /etc/ld.so.conf << "EOF"
# Begin GNOME-1 addition to /etc/ld.so.conf

/opt/gnome-1.4/lib

# End GNOME-1 addition
EOF

Remember to execute ldconfig after installation of libraries to update the library cache.

Add to your /etc/man.conf:

cat >> /etc/man.conf << "EOF"
# Begin GNOME-1 addition to man.conf

MANPATH /opt/gnome-1.4/man

# END GNOME-1 addition to man.conf
EOF