1. A private server, though I might make it public after a while. Either way, we're looking at around 10-15 people.
2. By add-ons, I mean add-ons... Like an add-on for Buildcraft, Industrialcraft, etc. Such as the Rocketry Add-on for IC².
3. OK
4.
I mean that ;3 That's done with a mod that allows you to pick which enchantment to use on your item. Normal enchanting won't work, but using this mod, you can put enchantments on most items. Sometimes, this has the interesting effect of actually doing something, in this case it decreases the heat received by Coolant elements, and increases the longevity of Uranium :3