Well, then you're in for a long and arduous road, my friend. The only way to add a new ship without excel is (and I still do this before editing with excel) copy a line from a similar ship and paste it in the proper place on both defaultloadout and defaultcore. Then edit from there ensuring that you keep it tab-deleniated so that SFC3 doesn't choke on it.
Your best bet, hate microsoft or not, get excel if you want anything like an easy time adding new ships.