16.0.8 is not a required update, you can skip it, it's a hotfix. Also server owners don't need to update anything, it is clientside only.
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Type in the modpack name (Tekxit 4 (Official)) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select Tekxit 4 (Official) from the list on the left. The launcher will handle everything else!
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