Minecraft JET updated to version 2.5 Classic
Added MCHeli Addons
Added Better Foliage (deactivated)
Added Dynamic Surroundings (deactivated)
Updated many mods
Removed some crafting recipes for turrets
Type in the modpack name (Minecraft JET) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select Minecraft JET from the list on the left. The launcher will handle everything else!