1. Download GTA Alien City HERE

2. Install it on a clean GTA SA

3. Check if your game works on Single Player

4. Get GTA:Alien City MP Client from here

5. Copy everything from GTA_Alien_City_MP_Client folder to GTA SA folder

6. Run samp.exe

7. Join 77.162.16.18:8901

8. Have fun

I will release the server later...