I know the TEC/PSI/PHASE names themselves can be changed in the English.str file, but I have 10 additional races each with 40 names waiting for a hardcode to be adjusted to support at least 20 races. I found out that atm SINS only supports 3 races in regard to Capitalship names, which is very different from the NameStringID and DescriptionStringID; it's these sorts of things I wanted:
StringInfo
ID "IDS_CAPITALSHIPNAME_ALIENA37"
Value "Soo'Cah'Teng"
StringInfo
ID "IDS_CAPITALSHIPNAME_ALIENA38"
Value "Sla'Guv"
StringInfo
ID "IDS_CAPITALSHIPNAME_ALIENA39"
Value "Mey'Lot'Coo"
(where "AlienA" is actually AlienA - AlienJ for 400 new Capitalship Names -10 races, 40 names).
SINS 1.1 may allow additional races, but they have to draw names from the TEC/PSI/PHASE bucket.