ZSU runs a seperate repository which includes special factions and mission assets. This repository is not required to play all of ZSU's missions, but is required for special repo nights which are run once or twice a month. This includes factions like Star Wars, Vietnam etc.
Import Repository
Navigate back to the Repositories tab of ArmA3Sync and click the blue plus symbol. In the Public auto-config url section, paste the following HTTP link:
http://repo.zsu.gg/special/.a3s/autoconfig
Once entered, select the Import button. It will attempt to connect to the repository. On a successful connection, it will read Connection success!. If successful, select OK to save and exit this prompt.

Notifications
Back under the Repositories tab select the Notify checkbox for the ZSU ARMA3 Mission Repo then click the Connect to repository button (bottom-most button) to enter into the repository.

Auto Discover and Download
Tick the Auto-Discover box then click the green tick on the far left so that ArmA3Sync automatically finds the @ZSU_M-Core folder of our missions repository.
Alert!
Do not re-download @ZSU_M-Core. This will break your main repo next time it
updates. Instead, find the installation location and direct ArmA3Sync to it's
parent folder found under Addon Options -> Addon Search Directories.

Next, tick the folders in the repo and click the download button (black play icon).
Import Modset and Launch
Navigate to the Addons tab and select the blue plus Modsets button and tick ZSU ArmA3 Special Repo and hit OK.

Next, create a new Group by right clicking in the empty space under Addon Groups and name it DLC. Drag SPE from the Available Addons tab into the new DLC Group folder you just created

From here you can select the modset from the addons tab and launch the game with the following options enabled:


