You can visit the pages for all of the mods in the pack(Except Color Code GUI, which I messaged the author of, NukeDuck, to get permission) to see permissions.
Install Improved Vanilla Client
Step 1
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.
Step 2
Type in the modpack name (Improved Vanilla Client) or paste the following url into the search box.
Step 3
Finally, click Install at the bottom right of the launcher after you select Improved Vanilla Client from the list on the left. The launcher will handle everything else!