The Poser 'readScript' command (note the upper case "S") can be used in a pose file to call other pose files. It can be used in a MOR pose to call a delta a injection pose. After the readScript command, the line contains the path to the delta injection pose, using ":" in place of "/" as the separator, and with the path enclosed in double quote marks, eg: {

version
        {
        number  3
        }

        readScript ":Runtime:libraries:!Injections:Project:Elf_Face_DELTAS.pz2"
        readScript ":Runtime:libraries:!Injections:Project:Elf_Ears_DELTAS.pz2"

actor head
        {
        channels
                {
                targetGeom PBMCC_01
                        {
                        name Elf Face
                        hidden 0
                        keys
                                {
                                k 0 1
                                }
                        }
                targetGeom PBMCC_02
                        {
                        name Elf Ears
                        hidden 0
                        keys
                                {
                                k 0 0.5
                                }
                        }
                }
        }
}

The above pose file would load (for example) elf face and elf ears morphs, set the dial names, and hidden status for the dials, set the Elf Face morph to be fully expressed, and the Elf Ears morph to be expressed at a value of 50%. Note that a normal delta injection can only inject a morph into a channel that already exists in the figure.