How to create a new mods?

[Goblin Wizard]

Adding ships and stuff to normal shops or BM was always difficult. The main problem is testing cause you have to start a new game to see changes. The shops are far away so you have to waste a lot of time to play through the game or you have to mod starting system to contain such a shop. It was one of the reasons I've made my mod - to not waste time on such things.