Stumped here as well. One of the few strings I have yet to come across. There is a string you can modify to add faction points to a custom faction...however, the faction already has to be created. This won't really help in your case, but for those casual gamers who want to experiment can use this for their individual purposes. Located in the folder: My Documents/My Games/FallenEnchantress/Race should be an XML file generated for each Custom Faction you have designed. Within that file there is a string of code -
<RemCustomizationPts>0</RemCustomizationPts>
Changing this value should add more points to the faction customization tool for this particular faction. Additionally, just below that string of code you can also add additional abilities or weaknesses without changing customization points. Those strings would look like this:
<SelAbilityBonusOption>Wanderlust</SelAbilityBonusOption>
<SelAbilityBonusOption>XXXXXX</SelAbilityBonusOption> (replacing XXXXXX with the name of the ability you want to add using the specific name as it is listed in the CoreAbilities file).
Still haven't been able to figure out where the customization points originate from though 