I think he want to know how to change the element start with like i.e powdertoy always start with the dust element and he want to know if he can change it into stone instead. I don't think it's anything in the pref but that dust is element number 1 in the .h source. Just pointing that out
it can be made by script but this willl be too hard, because the content of script will just make you think that you have selected STNE while its actually DUST