Sammael,
Oops, yes, "Vision of the Abyss" does not have a misc. slot - silly thing to have overlooked when I changed it from a Warlock to a Telestic Animate to prevent the AI from moving it away immediately. Fixed in next release. As for getting killed by its bodyguards, however, these things happen

(Why were enemies allowed to assault the Infernal Gate in the first place??? - still, something to look at)
At 0 order, a tax level of 50-60% is enough to keep the Infernal Gate free of unrest. If you want to make a deal with the devil you have got to live with the results.

As the free devil-summoning is thematic, I am not changing this. Abysia gets the best free creature summoning site and must live with its few disadvantages.
Inigo Montoya,
1) You cannot. It is currently not possible to set a scenario to allow renaming. This sucks. I hope it is changed in future releases.
2) Pass
3) Overkill, I guess, and a guaranteed source of death magic
4) ANY text editor will do for editing text files. You can even use windows notepad if you are into S/M, though I advocate using a real text editor. On a windows platform, I would suggest using the
Programmer's File Editor for three reasons, 1) it is free, 2) it loads incredibly fast, and 3) it is good.