Installation prefix is /usr/local by default, while you need LogViewer to be installed with prefix /usr.
So the usual installation procedure is the following:
./configure --prefix=/usr
make
make install (must be root)
The best way to integrate LogViewer into your desktop is to add a child panel to the top edge, make it hide automatically and then add LogViewer to that panel. This way, you don't have to rearrange your desktop.