A security-related update of SA-MP 0.2 is now available (SA-MP 0.2X). You can find it on the Download Page. It is recommended that all SA-MP players and server owners update.
The SA-MP 0.2.2 server list will be discontinued. SA-MP 0.2.2 clients cannot connect to 0.2X servers.
This update includes fixes from 0.2.2 R3 client/server as well as the following:
- Fixed insecure handling of private messages. - Fixed packet fragmentation/MTU issue. - Various security updates to the netcode and connection logic. - Security updates to the client binaries. - Removed compression from the aiming vectors to improve accuracy. - Added seconds to server logs and also shows raw incomming UDP connections. - OnVehicleMod/OnVehiclePaintjob/OnVehicleRespray includes the origin playerid. - Added OnPlayerUpdate, a callback fired for every player network update. This will help server-side anti-cheat. - Limited filterscripts to 16.
The version of SA-MP previously being developed as 0.2.5 will become SA-MP 0.3 to avoid any confusion.
Quote Taken From: www.sa-mp.com
Download the SA-MP client installer from 1 mirror and install the program in to your GTA San Andreas folder.