Basically what Rival said. It's an uber massive pack of mods that are all compatible with each other. Thing is, you need a legit account to play.
What do you mean we can't save progress? If by backup, then no without mcmyadmin or a plugin, then we won't have auto backup. Saving the world is a fundamental part of the MC server and is there no matter what mod/server version you use.
I think in order to play tekkit with a cracked launcher, you have to install all of the mods that the tekkit launcher handles completely by hand. I think it can reach up to a few dozen.
The only thing is that the new server will not be saving its progress like our current MC does and that's because we can't run a second McMyAdmin install; well, we can, it would just take some work. However, if Tekkit has plugins like Bukkit does, then I'm sure there's a save plugin, so we don't have to mess with McMyAdmin.
What do you mean we can't save progress? If by backup, then no without mcmyadmin or a plugin, then we won't have auto backup. Saving the world is a fundamental part of the MC server and is there no matter what mod/server version you use.
I think in order to play tekkit with a cracked launcher, you have to install all of the mods that the tekkit launcher handles completely by hand. I think it can reach up to a few dozen.