how do i do this morphing thing?

i used the skill demon hunter mepehorthis or sumthing, i wanan morph my own custom unit into my own custom unit how do i do tat? for exmpaple i made a paladin of my own, and i want it to have tat 1 morhping skill, and once it morphs it goes into a customize dreedlord or suthing i dont know what my custom unit ids r. how do i do it?:bgrun:

Check the Data11 and the UnitID1 column for the spell Metamorphisis in Abilitydata.slk. You can enter the normal unit ID (the unit it will turn back after metamorphosis) and the alternate unit ID (the morphed unit).

But they are all custom am i am sure they dont have the same unit data..?:bgrun: and its little confusing how u xplained it:bgrun:

dam it did not come out... sry for spaming but, the 1 above did not come out, anyways i dont think it has the sama data, does it? and i'm little confuse how u explained it..?:bgrun: