It is user customizable... Defaults were made for basic hard point groups.. however, it is user defined... select first HP, then hold shift and select other HP's you want, then hold CNTRL and hit 1 - 4. the the list will be overwritten with the user selection.. same goes for 5-8 for enemy ship selection.. and so forth... there is no rhyme or reason...
not sure what editing this file will accomplish as it is constantly overwritten by user as they select enemy ships and HP's and assign keys to them ...