Okay so im having the issue with nothing happening lol. First off, I didnt have a cutsomurl folder, with a package folder in it. So i made one. Then i made the mods folder and put my mods in it.
Then I put that into zip and uploaded onto dropbox. Put the link into the custom zip and cleared the cache.
It downloaded tekkit lite, then at the end for that littlt bit said downloading custom zip, the progress bar never went up and the game just started. No issues, but also no new mods. Not sure why.