Figured out how to give outsider dorfs long beards. Here's the image taken from an arena dorf whose hair styles are the same as an outsider (read no entity stylings):
*click thumbnail to expand*

So pretty much whatever you want coming after the extremely long hair, you'd give the APP_MOD_IMPORTANCE a higher value. I gave the "beard" entry a 950.
I threw in the raw edits after hair type (curly/dense/greasy):
Here we set the growth rate. This will change the modifier (LENGTH) by 1 each day up to a maximum of 1000 from the start of the dwarf's life (early beards!) for as long as the dwarf is alive. The format is (APP_MOD_RATE|<rate>|<scale>|<min>|<max>|<start year>|<start day>|<end year>|<end day>) where the final two tokens can be replaced by NO_END if the growth is to continue indefinitely.
[APP_MOD_RATE:1:DAILY:0:1000:0:0:NO_END]
[APP_MOD_DESC_RANGE:10:25:75:125:200:300]
[TISSUE_LAYER_APPEARANCE_MODIFIER:CURLY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:GREASY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:DENSE:50:80:90:100:110:120:150]
[APP_MOD_NOUN:hair:SINGULAR]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
********[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:100:200:200:200:200:200:200]
[APP_MOD_IMPORTANCE:925]
[APP_MOD_NOUN:sideburns:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:150:190]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:100:200:200:200:200:200:200]
[APP_MOD_IMPORTANCE:925]
[APP_MOD_NOUN:moustache:SINGULAR]
[APP_MOD_DESC_RANGE:55:70:90:110:150:190]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:100:200:200:200:200:200:200]
[APP_MOD_IMPORTANCE:950]
[APP_MOD_NOUN:beard:SINGULAR]
[APP_MOD_DESC_RANGE:55:70:90:110:150:190]********I just tinkered with length. Putnam posted the BP_APPEARANCE_MODIFIER strings
here. Maybe at a later date I'll work in greasiness and density to outsider dorf beards too.
Really wish unkempt was one of the strings.EDIT: A pretty important note in all this is
you only want these raw edits in when you start a new game to roll your character as I'm sure you'd want the historical dorfs and the non-historicals to be free of these "glue on" descriptions, which will be redundant in their descriptions.
EDIT2: Realized I could just have the "glue on" description read APP_MOD_NOUN:unkempt beard:SINGULAR. So hobo dorfing is quite possible. No more neatly combed!
*click thumbnail to expand*