Get in
Everything you need to get on. One launcher for Namalsk, one unzip for Doom.
There is no pack to download. DayZ handles it — you just need the launcher.

Join through the DZSA Launcher and it installs the whole modlist and drops you on the island. Or add the server in the in-game browser.
You supply DayZ itself. Let the modlist finish before you hit connect — a half-loaded mod list is the usual reason a join bounces.
Resting while the crash gets fixed — the pack still works offline and on LAN.

Zandronum 3.2.1 + the Brutal Doom Community Expansion + a launcher.
Unzip anywhere, double-click PLAY HELLHOUSE.bat — it finds your own
Doom II and drops you in.
You supply your own doom2.wad — the one file we can't host.