Can any one tell if there's an option available to generate Extended Tektronix hex file in Codewarrior for MPC 5554? Or if there's some utility to convert the output executable file into Extended Tektronix hex file, it should be fine.
CodeWarrior for MPC55xx generates standard ELF DWARF file format. Did you check with Tektronix whether they do have a converter from ELF to Extended Tektronic Hex file?