I wanted to set up a little tekkit server for me and a few mates, I went through 3 or 4 videos before I found this one, It's the best one I found and he gets back to you straight away if you have any problems.I thought i'd help him out and share it with some people.
I don't know how to embed so here's the link.
If that doesn't work just type 'how to make a tekkit server 3.1.2' I think the channel's called parallel games it should be like the second one down