Also I can work on GUI interfaces if you give a default style, I would really love to help, I rendered mobs for the vanilla pack and could help along with the process.
xD Other than that I wish you luck and hope you would like the help!
Hey, if you want any help with your texture pack I'm willing to help I've been working on my own version of the disco pack since about 1.0 and could help provide textures that would fit in. I'm not super experienced with tekkit but I would love to help, I have already finished mob folders, title folders, some of the art, the GUI's up to 1.3. If you interested just let me know.