To make an inj pose file is fairly easy if you can use a text editor like wordpad. Create the morph in Poser and save the character as a cr2 file (not compressed) then look at the attached file 

{
version
{
number 4.01
}
actor head < change actor
{
channels
{       
            targetGeom PBMCC_20
            {
            name v3overbite < change morph name
            initValue 0
            hidden 0
            forceLimits 1
            min -100000
            max 100000
            trackingScale 0.02
            keys
                {
                static  0
                k  0  0
                }

replace  from here  with the same block from the cr2

            interpStyleLocked 0
           indexes 4336
            numbDeltas 38284
            deltas
                {
                d 32329 0 -0.0003809929 0.002667001
                d 32330 0 -0.0003809929 0.002667001
                ......... etc.........
                d 36664 0 -0.0003809929 0.002666999

to here

                }
            blendType 0
            }

}
}
}

 

from interpStyleLocked to the end of the d lines is copied from the cr2 and pasted into a text file. Then change the actor and name lines for your morph.