Hey man, nice that you are playing my map.
First question, which version are you playing on currently, I need to know that because I fixed some bugs in the latest patches and so if you are playing on a older version they might be fixed already
-About the snow, you will need the glacial recepriactor (or something like that) for that quest, It should have been unlocked when you had completed that quest, but it might be uncraftable. (something happened a time ago with the minetweaker scripts and I havent been able to change them all back yet
-Soul sand same thing, I still need to find a proper quest to add it in the hqm system (if I already havent done, since you will need soul sand for soularium, if i didnt add it there I will add it again.
-twilight portal is disabled atm, I really have to find a proper way to use it, since all the hills with all their ores in it can break the map. I am still debating on what I should do. I mostly added it for certain items like the charms of life and charms of keeping
-Pff I still missed some chunks in the nether, not going to fix this since then I have to redo the complete map. But that you explored the full nether wall suprised me a bit
-I am already debating if I am going to add another mod(mostly thaumcraft of blood magic) to it. Just saying when i do this it will be a big update. I might do this when I want to update the map a bit (might as well try to get the nether fixed then) then I add some extra structures. I also have to see if I can start learning modtweaker a bit since you can add extra recipes then to the way of crafting of those mods.
-Also about the quests, I have started to setup a bit of a AE quest line. This way I can explain how to use AE to the guys who dont know it and add some extra quests to it. But since I am busy with fixing most of the bugs in the HQM book I have to add them in one go, which makes it take more time. First I really want to have fixed all the other bugs in the HQM book atm so you can atleast progress through them.
For the things that I am not sure on yet I have to speak my partner Spirit about that, but since he is on vacation atm, and I am in about 2 weeks (dont know excactly when he will be back).