7. Make sure the library links are correct. /usr/lib/libtiff.so.3 should point to /usr/lib/libtiff.so.4 (or to the same thing as /usr/lib/libtiff.so.4 points to) If not, type:
sudo ln -s /usr/lib/libtiff.so.4 /usr/lib/libtiff.so.3
This is the important part! The iP4200 driver wants to use libtiff.so.3, but that is an old version. We fix this by making libtiff.so.3 a link to libtiff.so.4.
Also, /usr/lib/libpng.so.3 should point to /usr/lib/libpng.so If not, type:
sudo ln -s /usr/lib/libpng.so /usr/lib/libpng.so.3
and /usr/lib/libxml2.so.2 should point to /usr/lib/libxml.so.1 If not, type:
sudo ln -s /usr/lib/libxml2.so.2 /usr/lib/libxml.so.1