Thanks for the reply plowman
i will fix the modpack.jar but i don't have the skills to tweak anything in the mods, meaning i don't really have a need for the configs. I don't know how to create them either. I also couldn't find the legacy versions of mekanism and thought that the 1.7.10 would be fine.
Anyway I'll fix the modpack.jar and look for the legacy versions
Thanks