1) Download SA-MP Client: http://www.sa-mp.com/download.php
2) Download their downgrade patch
3) Install
4) Add Westcoast Roleplay to your favorites
Server Ip: 67.228.226.108:4477
5) Make sure you have a roleplay name Firstname_Lastname
6) When you go in register a password /register <password>.
7) Start to play!
8) You need to get GSC in order to use invoice chat, you can get it here
http://www.getgsc.com