yum install glibc.i686
yum install libxml2.i686
yum --enablerepo=updates-testing install gdk-pixbuf2.i686
yum --enablerepo=updates-testing install gtk-x11.i686
yum --enablerepo=updates-testing install gtk2.i686
yum --enablerepo=updates-testing install libcanberra-gtk2.i686
yum install mesa-libGLU.i686
yum install libidn.i686
yum install libXt.i686

rpm -ivh AdbeRdr9.5.1-1_i486linux_enu.rpm

Notes: I kept getting “Protected multilib versions:” but using –enablerepo=updates-testing seems to have fixed it.