Regenerating Hull is a feat made possible through hooks. In Shattered Worlds case, FLAC (Freelancer Anti-Cheat) makes this possible. This can be done with FLHook if you have the appropriate plugin. However, I do not know for certain there is one out there that does this.
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In regards to Mortar, you can "fake it" and make it have desired effect.
- Create it the same way you would a missile/torp
- Simply set "force_gun_ori = true"
- "turn_rate = 0"
- You'll have to play with the acceleration, muzzle velocity, tracking, time to lock, and seeker range to obtain the desired effect
- Lastly, you need to make the designated hardpoint on the ship point in the desired direction
If all goes well, when you fire it... it should arc upwards at the desired speed till the time to lock kicks in, then arc down toward its target. This may seem cumbersome and a lot of work, but FL modding is pretty much nothing more than figuring out workarounds to obtain the desired feat (beyond the conventional modding aspects).
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The last one... yeah, good luck with that one 