SOLVED:
You are correct. If you copy the files:
creality_ender3_0.2.inst.cfg
creality_ender3_0.3.inst.cfg
creality_ender3_0.4.inst.cfg
creality_ender3_0.5.inst.cfg
creality_ender3_0.6.inst.cfg
creality_ender3_0.8.inst.cfg
creality_ender3_`1.0.inst.cfg
name the copies as:
creality_ender3pro_0.2.inst.cfg
creality_ender3pro_0.3.inst.cfg
creality_ender3pro_0.4.inst.cfg
creality_ender3pro_0.5.inst.cfg
creality_ender3pro_0.6.inst.cfg
creality_ender3pro_0.8.inst.cfg
creality_ender3pro_`1.0.inst.cfg
I don't know if this part is necessary but within all those files I changed the 4th line from:
definition = creality_ender3
to:
definition = creality_ender3pro
And everything works now.