Crom's Mountain looks cool.
The only problems that I see are (potentially) the double "#clearmagic" entries and somehow you ended up with only 6 unit lines with an "@7". Looks like you removed one manually without updating the count to "@6".
Also, "_FS_ES_DS_BS_" would require the province to have it's terrain flagged as fire, earth, death AND blood site locations, which I believe will never occur in a Dom3 generated random map.
I might also suggest making a 2nd version of the file so that folks who use the border mountains option in Dom3 are able to get this province.
Something like:
Jutetrea3_CLD_U_A_N_MNT_FS_.gan
and
Jutetrea3_CLD_U_A_N_EMT_FS_.gan
(Thanks for trying out the editor!)