That all sounds fine.
When I get home next week, I'll upload a copy of strive 5.20a for posterity and so you and try my mod (if you don't have a copy of 5.20a already, that is).
In short, ponymod adds three new races and integrates them in all places in strive's code. It's more complex than just adding an entry in races.gd. I have to modify code wherever a race is mentioned... about 5-7 files, I'd estimate.
It also add a bunch of optional features that can be tuned off or on by editing one of the mod files (ponysettings.gd).
easymode: Tweaks variables to be easier (more start money, etc).
longpreg: increases pregancy time and decreases growup time.
feralpreg: Allows feral males to impregnate beastkin females. To turn this on or off, edit ponysettings.gd.
pubes: replaces shaven vaginas with natrually hairy vaginas. No variance; girls either have no hair (vanilla) or unshaven/natural hair (mod). furrymode: more furries (+40%) and less humans (-40%).
Does any of that sound interesting?