Okay, here is a K1 guide:
I don't know what you want in a Romance guide for TSL. There really is no Romance. You get a couple lines at the end, but really all you have to do to get those are have high influence with the character you want to romance (Handmaiden, Visas, Atton or Disciple). Sorry, what you already found is probably it...
As for TSL romance mods...I'm sure there are some. You could probably check the TUE here on the forums or At Kights of the Old Republic File Front.