The orientational phase diagram and ordering of guest liquid crystalline (LC) rods in a host liquid crystalline polymer (LCP) matrix quenched below the glass transition is determined by field theory. Microscopic anisotropic interactions can align the LC rods to each other and also align LCP matrix side chains and the LC rods in the plane normal to the local LCP chain contour. Our numerical analysis suggest ways to exploit host entropy, anisotropy of microscopic interactions and manipulate properties of LC rods for modern applications. We predict a nematic-nematic discontinuous orientational transition from a guest stabilized to a guest-host stabilized region and a reentrant transition from a guest stabilized nematic region to a host only stabilized regime. A detailed analysis of phase boundaries transitions and ordering is presented. (C) 2004 Elsevier B.V. All rights reserved.