Warehouse Keeper: Possibility of changing Roman numerals at will.

I would like to know if it is possible to change the Roman numerals, by 2 letters that we want, to be able to have each space ordered by sets, for example, in space number 3, put "HP", space number 4 " MP", space number 5 "PA", space number 6 "MA", space number 7 "RB", etc... It seems silly but it is very useful, thanks!